Gwyneth Paltrow wore a figure-hugging Stella McCartney  to the Met's Costume Institute Gala in NYC tonight. The gorgeous gown showed off Gwyneth's hot body with a sexy slit and cutout back. She was among many other stars to don looks from the designer, including Kate Hudson , Naomi Watts , and Rihanna . Gwyneth took a minute to chat with a Chanel-clad Blake Lively  on her way into the event, after her pals Jay-Z and Beyoncé Knowles  already made their entrance. Make sure to weigh in on all the 2011 Met Gala red-carpet  looks with Fab and Bella's live love it or leave it polls!