Demi Lovato is one of our favorite performers, and not for nothing. The singer (who rocked the red carpet) elevated the iHeartRadio Music Awards to a whole new level on Sunday night, performing a stripped-down version of her hit "Stone Cold." Country superstar Brad Paisley skipped out on the ACM Awards to be on guitar duty for her. "Demi Lovato just sang her ass off," remarked Justin Timberlake, taking the stage after her. Watch it now; you won't regret it!
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