Last Night's Look: Love It or Leave It?We can't stop talking about the outfits Katy Perry, Jessica Biel and more stars were just spotted in! Check them out, then vote – fashion-forward or fashion fail?

MICHELLE WILLIAMS

The pixie princess stuns in a navy dress with exaggerated hips by Katie Ermilio and a million dollars worth of Tiffany & Co. jewels at the brand's Manhattan bash. No wonder she's smiling so big.