Ugh! This is really gonna piss off the Lovatics!
What the Skyscraper singer certainly didn't need was more antagonism from Miley Cyrus' friend Cheyne Thomas, a.k.a. the insensitive dude who mocked Demi's history of substance abuse with his totally cruel video.
He called her out on Twitter earlier today, but then the delightfully delicious Barney babe actually fired back!
Ch-ch-check out the X Factor judge's entire
exchange X Change with him…AFTER THE JUMP!!!