Last Night's Look: Hit or Miss?

Check out the head-turning outfits Ashlee Simpson, Rihanna and more stars were just spotted in! Then decide – fabulous or fashion fail?

CHLOË MORETZ

The young actress looks all grown up in a tiered sweetheart Yves Saint Laurent gown worn with all-black accessories including a choker (apparently she and Emmy Rossum got the same memo!) and slicked-back strands at the Met party in N.Y.C.