Met Costume Institute Gala 2010 : Some Choice Cuts

Coco Rocha in Zac Posen

Blake Lively, in Marchesa

Lady Gaga performing in Giorgio Armani

Emma Roberts in Marni

Lily Doanldson in Marc Jacobs

Taylor Swift in Ralph Lauren

Dree Hemingway, in Calvin Klein Collection

Emma Watson in Burberry with designer Christopher Bailey

Chanel Iman in Michael Kors

January Jones, in Yves Saint Laurent, with designer Stefano Pilati.

Charlotte Gainsbourg, in Balenciaga, with designer Nicolas Ghesquière.

Marion Cotillard, in Dior

Janet Jackson in Lanvin

Phillip Lim, in his own design, with Alexa Chung, in 3.1 Phillip Lim

Valentino's Pier Paolo Piccioli and Maria Grazia Chiuri, with Anne Hathaway and Kate Bosworth, both in Valentino.

Chloë Sevigny in Proenza Schouler with designers Jack McCollough and Lazaro Hernandez

Sasha Pivovarova, Sean Lennon, and Kemp Muhl, all in Marni

Francisco Costa with Zoe Salanda and Diane Kruger both in Calvin Klein

Carey Mulligan in Mui Mui

All images by Style.com