WASHINGTON - In a blending of popular entertainment and cutting edge technology, music fans can watch a live stream of some of music's biggest acts, in the just-opened iTunes Festival London 2013.
With flying pigs and wigs, Lady Gaga debuted her "ARTPOP" songs at the festival Sunday, performing seven new songs, as she headlined the event at London's Roundhouse Sunday night.
It is Gaga's first solo show since she had hip surgery in February.
Monday's performers include Sigur Ros and Polica.
Apple's free app, requires an iPhone, iPod, or iPad running iOS 6.0 or later.
Users of the app will be able to stream some performances as they happen, while others will be recorded and made available for later playback.
The Lady Gaga concert started with her swinging over the audience in a cage and involved many on-stage costume changes, elaborate wigs and dancers in hazard suits wearing pig masks, hanging from the ceiling.
The songs included "Jewels & Drugs" -a rap number featuring T.I.- pop song "Sex Dreams" and ballad "I Wanna Be With You."
Also the title track of Gaga's new album, "ARTPOP," which is released Nov. 11.
iTunes Festival continues throughout September with Elton John, Justin Timberlake and Katy Perry on the line-up.
The Associated Press contributed to this report.
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