Demi Lovato Performs 'Cool For the Summer,' 'Jumper' at iHeartRadio Music Festival 20
 

Former Disney Channel star Demi Lovato has been enjoying the wild success of her latest summer anthem "Cool For The Summer" and in the midst of her first-day performance at Las Vegas' iHeartRadio Festival, the singer stormed the stage in a bodysuit to perform renditions of "Really Don't Care," "Heart Attack" and her latest single. Making the show a bit more unique, Lovato executed a duet with Third Eye Blind front man Stephan Jenkins on the band's 90s smash hit, "Jumper."

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