Demi Lovato made her acting debut as a child in 'Barney & Friends' before starring in Disney's 'Camp Rock.' She's released four albums since 2008, and was a judge on 'X-Factor' for two seasons. She calls her fiercely loyal fans 'Lovatics.'
Imagine Dragons is an American alternative rock band from Las Vegas, Nevada. The band gained exposure following the September 2012 release of their debut studio album, Night Visions, and Billboard named Imagine Dragons "The Breakthrough Band of 2013.”