Photos: 2015 Billboard Music Awards

Mariah Carey performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Chris Pizzello/Invision/AP)

Taylor Swift poses in the press room with the awards for top Billboard 200 album for 1989," top female artist, chart achievement, top artist, top Billboard 200 artist, top hot 100 artist, top digital song artist, and top streaming song (video) for Shake It Off at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP) — Taylor Swift poses in the press room with the awards for top Billboard 200 album for 1989,” top female artist, chart achievement, top artist, top Billboard 200 artist, top hot 100 artist, top digital song artist, and top streaming song (video) for Shake It Off at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Ben McKee, from left, Daniel Reynolds, Daniel Sermon, and Daniel Platzman of Imagine Dragons perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, 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 17, 2015, in Las Vegas. (Photo by Chris Pizzello/Invision/AP)

Kelly Clarkson performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Chris Pizzello/Invision/AP)

Kanye West performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Chris Pizzello/Invision/AP)

Charlie Puth, from left, Wiz Khalifa, and Lindsey Stirling perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Chris Pizzello/Invision/AP)

Niall Horan, from left, Louis Tomlinson, Harry Styles, and Liam Payne of One Direction accept the award for top touring artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Chris Pizzello/Invision/AP)

Kimberly Schlapman, from left, Faith Hill, and Karen Fairchild perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Chris Pizzello/Invision/AP)

Bryshere Y. Gray performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, 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 17, 2015, in Las Vegas. (Photo by Chris Pizzello/Invision/AP)

Tori Kelly performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Chris Pizzello/Invision/AP)

Liane Valenzuela arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Mariah Carey arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Nick Young, left, and Iggy Azalea arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Britney Spears, left, and Charlie Ebersol arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Taylor Swift, right, hugs Calvin Harris after winning the award for top billboard 200 album for “1989” at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Chris Pizzello/Invision/AP)

Photo by Chris Pizzello/Invision/AP

Lauren Jauregui, from left, Ally Brooke, Normani Hamilton, Dinah-Jane Hansen, and Camila Cabello of the musical group Fifth Harmony arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Chrissy Teigen, left, and John Legend arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Meghan Trainor arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Jennifer Lopez arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Dencia arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Mariah Carey arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

50 Cent arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Zendaya, from left, Hailee Steinfeld, Taylor Swift, Lily Aldridge, and Martha Hunt arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Nick Young, left, and Iggy Azalea arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Meghan Trainor arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Chrissy Teigen arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Natalie La Rose arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Estelle arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Laverne Cox arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Iggy Azalea, left, and Britney Spears arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

Kerri Kasem arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (Photo by Eric Jamison/Invision/AP)

Photo by Eric Jamison/Invision/AP

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