Someone's feeling feisty!
And we kind of like it!
Demi Lovato is most def a sweetheart, but it's kind of nice to see a little spice come out of her from time to time.
DemDem supposedly made it pretty damn clear that she's no Belieber during one contestant's performance of the Biebs' song As Long As You Love Me.
Our Simon Cowell-in-training allegedly remarked during critiques: