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

RIHANNA

Though it may have been more interesting if she showed up in her GQ cover look, Rih's outfit at the magazine's L.A. party is pretty eye-catching too: a red Calvin Klein Collection slip dress, matching sandals and Neil Lane jewelry.