After shutting down the iHeartRadio Music Awards red carpet in an Alexander McQueen look [1], Demi Lovato [2] took the stage to sing her hit single, "Stone Cold" [3] — and we couldn't keep our eyes off her outfit change.

Demi slipped into an H&M x Balmain blazer dress [4] for her chill-inducing performance alongside country crooner Brad Paisley on the guitar. The sleek jacket style has become a signature look for Demi both on stage and on the red carpet [5]. Keep scrolling for more pictures of Demi singing "her ass off," as Justin Timberlake [6] put it. Then, admire her fiery GLAAD Media Awards ensemble [7], featuring — you guessed it — another blazer.