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Taylor Swift performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Taylor Swift performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Justin Bieber performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Justin Bieber performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Justin Bieber performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Justin Bieber performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Jennifer Lopez, third from left, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Jennifer Lopez, third from left, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Jennifer Lopez performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Jennifer Lopez performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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In this photo provided by the Las Vegas News Bureau, actress, comedian Jenny McCarthy walks the red carpet for the Billboard Music Awards at the MGM Grand Garden Arena on the Las Vegas Strip. Sunday, May 19, 2013. (AP PhotoLas Vegas News Bureau, Glenn Pinkerton)
In this photo provided by the Las Vegas News Bureau, actress, comedian Jenny McCarthy walks the red carpet for the Billboard Music Awards at the MGM Grand Garden Arena on the Las Vegas Strip. Sunday, May 19, 2013. (AP Photo/Las Vegas News Bureau, Glenn Pinkerton)
In this photo provided by the Las Vegas News Bureau, actresssinger Selena Gomez in a sexy dress, slit from top to bottom walks the red carpet for the Billboard Music Awards at the MGM Grand Garden Arena on the Las Vegas Strip. Sunday, May 19, 2013. (AP PhotoLas Vegas News Bureau, Glenn Pinkerton)
In this photo provided by the Las Vegas News Bureau, actress/singer Selena Gomez in a sexy dress, slit from top to bottom walks the red carpet for the Billboard Music Awards at the MGM Grand Garden Arena on the Las Vegas Strip. Sunday, May 19, 2013. (AP Photo/Las Vegas News Bureau, Glenn Pinkerton)
In this photo provided by the Las Vegas News Bureau, actress, singer Hayden Panettiere of TVs Nashville and Heroes fame walks the red carpet for the Billboard Music Awards at the MGM Grand Garden Arena on the Las Vegas Strip. Sunday, May 19, 2013. (AP PhotoLas Vegas News Bureau, Glenn Pinkerton)
In this photo provided by the Las Vegas News Bureau, actress, singer Hayden Panettiere of TV’s “Nashville” and “Heroes” fame walks the red carpet for the Billboard Music Awards at the MGM Grand Garden Arena on the Las Vegas Strip. Sunday, May 19, 2013. (AP Photo/Las Vegas News Bureau, Glenn Pinkerton)
From left, Shaniece Cole and Cee Lo Green present the milestone award to Justin Bieber at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
From left, Shaniece Cole and Cee Lo Green present the milestone award to Justin Bieber at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
From left, Shaniece Cole and Cee Lo Green present the milestone award to Justin Bieber at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
From left, Shaniece Cole and Cee Lo Green present the milestone award to Justin Bieber at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Justin Bieber accepts the milestone award at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Justin Bieber accepts the milestone award at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Akon performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Akon performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
From left, Wanya Morris, Nathan Morris and Shawn Stockman, of musical group Boyz II Men, arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
From left, Wanya Morris, Nathan Morris and Shawn Stockman, of musical group Boyz II Men, arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Wiz Khalifa arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Wiz Khalifa arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Sky Blu poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Sky Blu poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
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Tyler Hubbard, left, and Brian Kelley, of musical group Florida Georgia Line, speak on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Tyler Hubbard, left, and Brian Kelley, of musical group Florida Georgia Line, speak on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Sky Blu poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Sky Blu poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Morten Harket, of musical group A-ha, poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Morten Harket, of musical group A-ha, poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Taylor Swift poses backstage with her awards at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. Swift won awards for top female artist, top Billboard 200 artist, top digital songs artist, top country artist, top Billboard 200 album and top country album for Red, and top country song for We Are Never Ever Getting Back Together. (Photo by John ShearerInvisionAP)
Taylor Swift poses backstage with her awards at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. Swift won awards for top female artist, top Billboard 200 artist, top digital songs artist, top country artist, top Billboard 200 album and top country album for "Red," and top country song for "We Are Never Ever Getting Back Together." (Photo by John Shearer/Invision/AP)
Taylor Swift poses backstage with her awards at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. Swift won awards for top female artist, top Billboard 200 artist, top digital songs artist, top country artist, top Billboard 200 album and top country album for Red, and top country song for We Are Never Ever Getting Back Together. (Photo by John ShearerInvisionAP)
Taylor Swift poses backstage with her awards at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. Swift won awards for top female artist, top Billboard 200 artist, top digital songs artist, top country artist, top Billboard 200 album and top country album for "Red," and top country song for "We Are Never Ever Getting Back Together." (Photo by John Shearer/Invision/AP)
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Celine Dion poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Celine Dion poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Taylor Swift poses backstage with her awards at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. Swift won awards for top female artist, top Billboard 200 artist, top digital songs artist, top country artist, top Billboard 200 album and top country album for Red, and top country song for We Are Never Ever Getting Back Together. (Photo by John ShearerInvisionAP)
Taylor Swift poses backstage with her awards at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. Swift won awards for top female artist, top Billboard 200 artist, top digital songs artist, top country artist, top Billboard 200 album and top country album for "Red," and top country song for "We Are Never Ever Getting Back Together." (Photo by John Shearer/Invision/AP)
Celine Dion poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Celine Dion poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Prince performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Prince performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Prince performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Prince performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Prince performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Prince performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Erykah Badu, left, and Janelle Monae announce the icon award at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Erykah Badu, left, and Janelle Monae announce the icon award at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Nicki Minaj performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Nicki Minaj performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Lil Wayne, seated, and Nicki Minaj perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Lil Wayne, seated, and Nicki Minaj perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Lil Wayne, left, and Nicki Minaj perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Lil Wayne, left, and Nicki Minaj perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Lil Wayne performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Lil Wayne performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Lil Wayne, left, and Nicki Minaj perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Lil Wayne, left, and Nicki Minaj perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
In this photo provided by the Las Vegas News Bureau, British duo Sophia Grace, right, and Rosie, from The Ellen DeGeneres Show,arrive at the Billboard Music Awards at the MGM Grand Garden Arena, Sunday, May 19, 2013, in Las Vegas, Nev. (AP PhotoLas Vegas News Bureau, Glenn Pinkerton)
In this photo provided by the Las Vegas News Bureau, British duo Sophia Grace, right, and Rosie, from "The Ellen DeGeneres Show,"arrive at the Billboard Music Awards at the MGM Grand Garden Arena, Sunday, May 19, 2013, in Las Vegas, Nev. (AP Photo/Las Vegas News Bureau, Glenn Pinkerton)
Celine Dion presents the award for Billboard artist of the year at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Celine Dion presents the award for Billboard artist of the year at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Celine Dion presents the award for Billboard artist of the year at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Celine Dion presents the award for Billboard artist of the year at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Celine Dion, left, presents the award for Billboard artist of the year to Taylor Swift at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Celine Dion, left, presents the award for Billboard artist of the year to Taylor Swift at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Taylor Swift accepts the award for Billboard artist of the year at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Taylor Swift accepts the award for Billboard artist of the year at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Taylor Swift accepts the award for Billboard artist of the year at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Taylor Swift accepts the award for Billboard artist of the year at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Chloe Grace Moretz speaks on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Chloe Grace Moretz speaks on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Pitbull performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Pitbull performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Gabriel Mann, left, and Stana Katic speak on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Gabriel Mann, left, and Stana Katic speak on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Wiz Khalifa, right, and Sky Blu speak on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Wiz Khalifa, right, and Sky Blu speak on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Kelly Rowland, left, and Austin Mahone present the award for top EDM artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Kelly Rowland, left, and Austin Mahone present the award for top EDM artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Ed Sheeran performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Ed Sheeran performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Justin Bieber, second from left, and will.i.am, second from right, perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Justin Bieber, second from left, and will.i.am, second from right, perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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David Guetta accepts the award for top EDM artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
David Guetta accepts the award for top EDM artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
David Guetta accepts the award for top EDM artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
David Guetta accepts the award for top EDM artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Jennifer Lopez is carried as she performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Jennifer Lopez is carried as she performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Justin Bieber performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Justin Bieber performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Justin Bieber performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Justin Bieber performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Jennifer Lopez performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Jennifer Lopez performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Jennifer Lopez performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Jennifer Lopez performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Justin Bieber accepts the award for top male artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Justin Bieber accepts the award for top male artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Justin Bieber is congratulated as he is announced the winner of the award for top male artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Justin Bieber is congratulated as he is announced the winner of the award for top male artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Miley Cyrus, right, presents the award for top male artist to Justin Bieber at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Miley Cyrus, right, presents the award for top male artist to Justin Bieber at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Miguel performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Miguel performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Host Tracy Morgan, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Host Tracy Morgan, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Nicki Minaj accepts the award for top rap artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Nicki Minaj accepts the award for top rap artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Selena Gomez, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Selena Gomez, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Chris Brown, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Chris Brown, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Taylor Swift, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Taylor Swift, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Carly Rae Jepsen poses backstage the award for top digital song for Call Me Maybe at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Carly Rae Jepsen poses backstage the award for top digital song for "Call Me Maybe" at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Justin Bieber, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Justin Bieber, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Madonna accepts the award for top touring artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Madonna accepts the award for top touring artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Madonna poses backstage with her awards for top touring artist, dance album and dance artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Madonna poses backstage with her awards for top touring artist, dance album and dance artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
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Madonna, winner of the awards for top touring artist, dance album and dance artist, poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Madonna, winner of the awards for top touring artist, dance album and dance artist, poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Madonna poses backstage with her awards for top touring artist, dance album and dance artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Madonna poses backstage with her awards for top touring artist, dance album and dance artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Keha speaks on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Ke$ha speaks on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Emmy Rossum, left, and Jason Derulo present the award for top Billboard 200 album on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Emmy Rossum, left, and Jason Derulo present the award for top Billboard 200 album on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Christina Aguilera performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Christina Aguilera performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Christina Aguilera, right, and Pitbull perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Christina Aguilera, right, and Pitbull perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Christina Aguilera performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Christina Aguilera performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Morten Harket, of the musical group A-ha, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Morten Harket, of the musical group A-ha, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Pitbull, from left, Morten Harket, of the musical group A-ha, and Christina Aguilera perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Pitbull, from left, Morten Harket, of the musical group A-ha, and Christina Aguilera perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Christina Aguilera, left, and Pitbull performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Christina Aguilera, left, and Pitbull performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Christina Aguilera, right, and Pitbull performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Christina Aguilera, right, and Pitbull performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Justin Bieber performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Justin Bieber performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Will.i.am presents the award for top touring artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Will.i.am presents the award for top touring artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Will.i.am, right, presents the award for top touring artist to Madonna at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Will.i.am, right, presents the award for top touring artist to Madonna at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Kacey Musgraves, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Kacey Musgraves, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Madonna accepts the award for top touring artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Madonna accepts the award for top touring artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Will.i.am, right, presents the award for top touring artist to Madonna at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Will.i.am, right, presents the award for top touring artist to Madonna at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Kid Rock presents the award for top rap song at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Kid Rock presents the award for top rap song at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Taylor Swift, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Taylor Swift, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Selena Gomez speaks on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Selena Gomez speaks on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Taylor Swift, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Taylor Swift, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Taylor Swift performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Taylor Swift performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Carly Rae Jepsen poses backstage the award for top digital song for Call Me Maybe at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Carly Rae Jepsen poses backstage the award for top digital song for "Call Me Maybe" at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Alyssa Milano poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Alyssa Milano poses backstage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Alyssa Milano, left, and Avril Lavigne present the award for top digital song at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Alyssa Milano, left, and Avril Lavigne present the award for top digital song at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Tracy Morgan speaks at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Tracy Morgan speaks at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Carly Rae Jepsen accepts the award for top digital song for Call Me Maybe at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Carly Rae Jepsen accepts the award for top digital song for "Call Me Maybe" at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Hayden Panettiere speaks on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Hayden Panettiere speaks on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Carly Rae Jepsen accepts the award for top digital song for Call Me Maybe at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Carly Rae Jepsen accepts the award for top digital song for "Call Me Maybe" at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Chris Brown performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Chris Brown performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Psy speaks on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Psy speaks on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Chris Brown, right, and Orianthi perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Chris Brown, right, and Orianthi perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Caroline Hjelt, of musical group Icona Pop, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Caroline Hjelt, of musical group Icona Pop, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Chris Brown performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Chris Brown performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Chris Brown performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Chris Brown performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Tracy Morgan, right, and Psy participate in a dance-off at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Tracy Morgan, right, and Psy participate in a "dance-off" at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Tracy Morgan, left, and Psy participate in a dance-off at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Tracy Morgan, left, and Psy participate in a "dance-off" at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Tracy Morgan, left, and Psy participate in a dance-off at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Tracy Morgan, left, and Psy participate in a "dance-off" at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Kimberly Perry, center, and Neil Perry, right, of musical group The Band Perry, perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Kimberly Perry, center, and Neil Perry, right, of musical group The Band Perry, perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
The Band Perry, from left, Neil Perry, Kimberly Perry and Reid Perry, perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
The Band Perry, from left, Neil Perry, Kimberly Perry and Reid Perry, perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
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Selena Gomez, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Selena Gomez, center, performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Shania Twain presents the award for top rap artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Shania Twain presents the award for top rap artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Shania Twain presents the award for top rap artist to Nicki Minaj at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Shania Twain presents the award for top rap artist to Nicki Minaj at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Bruno Mars performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris PizzelloInvisionAP)
Bruno Mars performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Mike Tyson arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Mike Tyson arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
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Casper Smart, left, and Jennifer Lopez arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Casper Smart, left, and Jennifer Lopez arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Wayne Newton, left, and Jennifer Nettles arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Wayne Newton, left, and Jennifer Nettles arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Jennifer Lopez arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Jennifer Lopez arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Miley Cyrus arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Miley Cyrus arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Shania Twain arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Shania Twain arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
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Miley Cyrus arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Miley Cyrus arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Miguel arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Miguel arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Kelly Rowland arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Kelly Rowland arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Chad Kroeger, left, and Avril Lavigne arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Chad Kroeger, left, and Avril Lavigne arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Chad Kroeger, left, and Avril Lavigne arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Chad Kroeger, left, and Avril Lavigne arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
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Keha arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Ke$ha arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Megan Wollover, left, and host Tracy Morgan arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Megan Wollover, left, and host Tracy Morgan arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Jenny McCarthy arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Jenny McCarthy arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Cathy Guetta, left, and David Guetta arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Cathy Guetta, left, and David Guetta arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
Wiz Khalifa, left, and Amber Rose arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John ShearerInvisionAP)
Wiz Khalifa, left, and Amber Rose arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by John Shearer/Invision/AP)
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