Fashion Face-Off: Demi Lovato vs. Kat Graham

One judges singers on The X Factor.

The other casts spells on The Vampire Diaries.

But both Demi Lovato and Kat Graham came out last night for the VH1 Divas concert special. And while we aren't sure how they feel about Miley Cyrus covering Billy Idol, we do know that they wore contrasting outfits on the red carpet.

Which do you prefer? Graham's white get-up? Or Lovato's black dress? VOTE NOW!