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Jennifer Lawrence swapped her Dior gown for a Tom Ford mini. (Getty)
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Lupita Nyong'o traded her Prada gown for a Miu Miu ensemble. (Getty)
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Anna Kendrick traded her J. Mendel gown in for a plunging Versace after party look.
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Penelope Cruz selected Giambattista Valli for the Oscars, and then slipped into a custom-made creation from the H&M Conscious Exclusive Collection.
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Kate Hudson swapped her plunging Versace gown for a equally sexy Zuhair Murad ensemble.
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Anne Hathaway rocked Gucci before trading it in for a Viktor & Rolf number.
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Amy Adams stunned in both Valentino & Carolina Herrera.
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Kristen Bell showed off her post-baby body in Roberto Cavalli, before slipping into a plunging Zuhair Murad gown. (Getty)
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Lady Gaga showed off not one, but TWO Versace gowns on Oscar night.
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Chrissy Tiegen swapped her floral Monique Lhuillier gown for a sexy Naeem Khan number.
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Jada Pinkett Smith was pretty in a pink Versace number before slipping into a Roberto Cavalli dress.
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Ellen Degeneres. the hostess with the mostess, showed off a slew of high-fashion looks, including a Saint Laurent tuexdo, which she wore to open the show. (Getty)