Met Costume Institute Gala 2011 From a Sexy Siren and a Ballerina Princess, to a Grecian Goddess.. These are the looks we’re lusting after this week… Blake Lively in a beige tulle pailette embroidered dress with chiffon sash from Chanel’s Fall/Winter 2009/10 Haute Couture Collection. Diane Kruger in a sexy Jason Wu dress and Jimmy Choo clutch. And finally, super mum Miranda Kerr in a Marchesa white swan...