Demi Lovato stopped by the American Idol show last night, and — no surprises here — she showed the contestants how it’s done. She took to the stage to perform “Confident” with a very special group of backup singers: the top 10 contestants! The group sang along to the hit that asks a very important question — what’s wrong with being confident?! (Nothing. Nothing is wrong with that.)

Demi followed up the group performance with a solo of her own, in which she sang her new single, the heartbreaking “Stone Cold.” Surprising no one, she killed the vocals, but what’s really beautiful is how much passion she has about what she does. She’s not afraid to show her emotions, and that takes major courage. Not to mention…can we talk about those high notes?! If you ever had any doubt that Demi could sing, lay it all to rest right here and now.