Last Night's Look: Love It or Leave It?Check out the head-turning outfits Katie Holmes, Jessica Chastain and more stars were just spotted in! Then decide – fabulous or fashion fail?

DEMI LOVATO

Demi has stuck to all-black ensembles for much of her X Factor stint, but for the show's L.A. finale, she dares to bare (and get people to stare) in a blue-and-copper cutout minidress, huge hoops and towering black pumps.