2011 Metropolitan Museum Costume Institute GalaHollywood's hottest – including Jennifer Lopez, Sarah Jessica Parker, Beyoncé – turned out to fête late, great designer Alexander McQueen

MARY-KATE OLSEN

The actress goes retro in a vintage Givenchy couture gown with emerald accents, which she complements with a Judith Leiber clutch and Van Cleef & Arpels jewels, including "Mandarin" garnet earrings and diamond rings.