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