Costume Institute Gala

It was the year's biggest fashion event: Monday night's 2011 Metropolitan Museum of Art Costume Institute Gala in New York City. And this year, the gala honored late designer Alexander McQueen with an exhibition dedicated entirely to his designs. Some of Hollywood's biggest fashionistas rocked the red carpet including Beyonce in a Pucci design, Renee Zellweger in Carolina Herrera, Rihanna in a skintight black Stella McCartney number, Madonna in Stella McCartney, Sarah Jessica Parker (a former muse of the late designer) in a form-fitting Alexander McQueen, Demi Moore in Prabal Gurung, Jennifer Lopez in a red Gucci gown and Kate Hudson in Stella McCartney.