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

CAMERON DIAZ

In a chic Stella McCartney party dress with a plunging neckline, plus a black clutch, strappy heels, and Pomellato jewelry, the actress gets festive for the Netflix-sponsored London premiere of Gambit.