While other stars opted for long, flowing gowns, Gisele Bündchen went thoroughly modern in a tight, short Alexander Wang dress made of braided leather and edged with long fringe. Her husband, Tom Brady, opted for a more traditional double-breasted tuxedo.
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30 Rock actress Elizabeth Banks stuns in a black biot and ostrich feather embroidered dress by Gucci.
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Thandie Newton stood out in a magenta Vivienne Westwood gown with an origami bust-line and black tulle, which she paired with Solange Azagury-Partridge jewels.
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Oprah Winfrey co-hosted the Met's Costume Institute gala and wore a custom Oscar de la Renta navy gown. She walked down the red carpet with the designer himself.
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Lady Gaga didn't walk the red carpet at the Met—but instead slipped through the back door. She posed with Anna Wintour inside the event, before Oprah called her to the stage. She performed four songs, including "Alejandro" and "Bad Romance” in a custom-made Giorgio Armani nude catsuit embellished with Swarovski crystals.
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Diane Kruger went chic and simple in a white Calvin Klein body-hugging dress as she posed for photos with the line's designer.
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Katy Perry set the red carpet aglow in a light-up strapless gown by CuteCircuit, which came with LED lights. She paired the bright look with Lorraine Schwartz jewels and Christian Louboutin heels.
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Model Doutzen Kroes channeled fairytale chic in baby blue Zac Posen gown with a long train.
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Margherita Missoni wore a black backless Missoni gown, a bohemian jeweled headband, and jewels by Harry Winston.
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Sienna Miller, on the red carpet with on-again beau Jude Law, glowed in a navy, jewel-encrusted Emilio Pucci dress—which went high in the front and flowed into a long train. She paired the look with Solange Azagury-Partridge jewels.
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Naomi Watts, with partner Liev Schreiber, opted for a fuchsia one-shouldered Stella McCartney dress, which she paired with bright red lips.
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Jennifer Lopez brought her usual high-glamour in a Zuhair Murad strapless gown, encrusted with gold leaves. She paired the dramatic look with Cartier jewels, a Judith Leiber clutch, and Sergio Rossi heels.
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Demi Moore stunned in a Lanvin gown.
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Taylor Swift looked all-American in an ivory Ralph Lauren Collection gown, which she paired with an antique platinum herringbone clutch.
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Stella McCartney brought not one but two dates with her to the big event—and they were both ladies: Liv Tyler and Kate Hudson. McCartney showed off her athletic legs in a black silk one-sleeved dress, while Tyler looked lovely in a lacy red and black organza Stella McCartney dress. Kate Hudson, meanwhile, flashed some leg, in a long nude silk Stella McCartney dress with embroidered diamonds.
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Vogue Editor in Chief Anna Wintour, who co-hosted the event with Oprah, wore a cream-colored Chanel Haute Couture dress. Her daughter, Bee Shaffer, wore a nude-colored Balenciaga dress with black embroidery.
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Zoe Saldana looked sleek and simple in a navy one-shouldered Calvin Klein dress.
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Blake Lively went short and sweet in a Marchesa mini-dress with ruffled paisley detail and bubble-gum-pink lips.
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Mary J. Blige looked peachy in a strapless rose-colored gown by J. Mendel.
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Kristen Stewart showed lots of leg in a short, asymmetrical Chanel Haute Couture dress, which she paired with Sergio Rossi black leather Cachet heels.
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Mick Jagger hit the gala in a silk blue scarf, while his girlfriend, L'Wren Scott, wore a high-cut dress of her own design.
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Barry Diller, CEO of The Daily Beast’s parent company, IAC, wore sunglasses on the red carpet, while Diane von Furstenberg channeled the event’s all-American theme in a star-spangled gown.
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Kate Bosworth embodied vintage glamour in a beaded Valentino gown, Christian Louboutin shoes, Van Cleef & Arpels jewels, and a Valentino clutch. She finished off the look with perfect finger-wave curls.
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Donna Karan looked white hot in a hip-hugging dress of her own design.
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Marion Cotillard sparked in a silver sequin Dior Haute Couture gown.
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Emma Watson glowed in a white silk Burberry gown, which she paired with a custom-made bag and shoes. She walked the red carpet with Burberry's chief creative officer, Christopher Bailey, who looked sharp in a custom-made Burberry tuxedo.
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Sarah Jessica Parker, now the creative director of Halston Heritage, wore a flowing gold-pleated dress from the fashion house—and a matching floral headpiece and Fred Leighton diamond bracelets.
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Brooke Shields channeled all-American glamour in a gold fishtail gown from Michael Kors' fall/winter 2010 collection. She wore Kors' Argento Python barrel clutch and Karung Platform sandals, but came with the best accessory on her arm—the designer himself.
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Gwen Stefani, with husband Gavin Rossdale, glittered in a one-shouldered gown by her own label, L.A.M.B.
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Renée Zellweger glittered in a black and gold Carolina Herrera gown, affixed with a giant bow.
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Anne Hathaway looked like an enchanted princess in a sparkling Valentino gown and Bulgari jewels.
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Chloe Sevigny stood out from the crowd in a teal Proenza Schouler dress, which she paired with 5-inch heels. Inside the dinner, she sat with Proenza Schouler designers Jack McCullough and Lazaro Hernandez.
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Donatella Versace glowed in a gold strapless Versace gown with a long train.
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Tina Fey made a daring choice on the red carpet—arriving in a navy Yves Saint Laurent jumpsuit, black Jimmy Choo stilettos, and Fred Leighton drop earrings.
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Kirsten Dunst wore a white lacy Rodarte for Gap gown, and arrived with Rodarte designers Kate and Laura Mulleavy.
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Kerry Washington stunned in a Grecian, bright red Thakoon for Gap design.
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Claire Danes glittered in a custom-made dark nickel metallic lace Burberry gown, clutch and shoes, while husband Hugh Dancy looked dapper in a Burberry notch-lapel tuxedo.
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January Jones looked futuristic in a fuschia Yves Saint Laurent dress and high black gloves.
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Mad Men's Christina Hendricks showed off her curves in a figure-hugging L'Wren Scott gown.
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Vogue editor at large Andre Leon Talley escorted Whoopi Goldberg down the red carpet; both were in matching Chado Ralph Rucci.
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Katie Couric wore a strapless white and black beaded gown.
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Eva Mendes looked rosy in a printed Dolce & Gabbana gown.
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