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

ELLE FANNING

It's official: Dakota's little sister has her own unique brand of standout style. The actress steals the spotlight in a whimsical Lanvin gown with plenty of volume at the hips. She accessorizes the frothy creations with a Jennifer Behr headband and Neil Lane jewels for the GLAAD Awards in N.Y.C.