NY1 VIDEO: The Annual Costume Institute Gala was held Monday night at the Metropolitan Museum of Art on 5th Avenue. The evening celebrated the opening of the Costume Institute's Anna Wintour Costume Center. Anna is the legendary Vogue editor and one of the co-chairs of the ball. She commanded that guests attend in their most formal attire. For men, that meant white tie, top hats and decorations. But the evening was all about the celebrities that turned out to support the Costume Institute, including Jay-Z, Beyonce, Charlize Theron, Sean Penn, Kim Kardashian, Kanye West, the Olsen twins, Anne Hathaway and Reese Witherspoon.