Last Night's Look: Love It or Leave It?We can't stop talking about Kristen Stewart's underwear-baring ensemble, Jessica Lowndes's sexy LBD and more outfits that stars were just spotted in. Check them out, then vote – fashion-forward or fashion fail?

PETRA NEMCOVA

"Vogue, strike a pose." That's what we imagine the supermodel is singing in her head as she flaunts her figure in this cobalt sheath, matching shoes and a gold-embellished clutch at the Elie Saab show in Paris.