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?

JANUARY JONES

Mad Men's ice queen looks regal in a long-sleeve, high-neck Yves Saint Laurent black column, plus Cartier jewels, at N.Y.C.'s Metropolitan Opera premiere of Manon.