Demi Lovato [1] made a huge statement on the iHeartRadio Music Awards red carpet on Sunday night, which was something along the lines of: "I look so damn good right now, it's almost criminal." The ridiculously talented singer [2] — who was honored with the Vanguard Award at the GLAAD Awards [3] on Saturday — walked the red carpet [4] without boyfriend Wilmer Valderrama [5] in a black and white suit, striking fierce pose after pose for photographers. Later on, she gave everyone in the audience a heavy dose of chills when she belted out a stripped-down version of "Stone Cold" [6] with the help of Brad Paisley, making it one of the most talked-about performances of the night. Keep reading to see more from her appearance, and then see all of her most awe-inspiring moments [7]!