Singer Fergie poses on arrival at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of the exhibition "Alexander McQueen: Savage Beauty" in New York May 2, 2011.[Photo/Agencies]

Singer Rihanna poses on the red carpet at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of Alexander McQueen: Savage Beauty, in New York, May 2, 2011.[Photo/Agencies]