Kate Hudson
The gorgeous actress dazzled in a sparkling Versace Atelier gown for the main event, and then switched to an alluring couture gown by Zuhair Murad for the Vanity Fair party afterwards.
Lupita Nyong'o
The Oscar winner lit up the red carpet in an ice blue Prada design for the show, and then swapped her gown for an embellished Miu Miu design to celebrate her big win.
Jada Pinkett-Smith
So elegant! Will Smith's ladylove looked feminine in a rosy pink gown by Versace for the red carpet, and then changed into an ivory dress with long sleeves and gorgeous beadwork for the rest of the evening.
Lady Gaga
The singer showed off two different looks throughout the night that were both heavy on beadwork and showed off her enviable figure.
Anne Hathaway
The brunette beauty looked lovely in a chic black and white Viktor & Rolf gown paired with platinum jewelry by Neil Lane for the after party after changing out of her glamorous Gucci dress.
Chrissy Teigen
John Legend's main squeeze looked lovely in a sweet Monique Lhuillier floral number earlier in the evening, and then changed into a sexy strapless black gown featuring a thigh-high slit for the late night festivities.
Jennifer Lawrence
Now this is a chic wardrobe change! J. Law looked lovely in a strapless Dior design featuring a peplum detail and then turned heads in a short embellished party dress for the rest of the night.
Penélope Cruz
The brunette beauty looked lovely in a pale pink Giambattista Valli gown for the awards show and then showed off her sensible style in a black flamenco-inspired dress by H&M and Chopard jewels for the Vanity Fair party.
Amy Adams
Adams showed off her figure in a strapless Gucci gown for the awards show and then stepped out in a white Grecian-inspired Carolina Herrera design and Tiffany & Co. jewels later.
Anna Kendrick
Kendrick showed off plenty of sexy skin in both of these designs featuring cutouts and sheer mesh details.
Jenna Dewan-Tatum
Channing Tatum's gorgeous wife looked exquisite in two shimmering gowns for the night.
Reese Witherspoon
The actress showed off plenty of skin in this low-cut cocktail dress. Irene Neuwirth earrings completed her edgy look.
Miranda Kerr
The model looked lovely in a silver beaded gown featuring a deep plunging neckline.
Kim Kardashian
The reality star flaunted major cleavage in a sultry red ballgown at the 22nd Annual Elton John AIDS Foundation Oscar viewing party.
Selena Gomez
The young star looked all grown up in a gold beaded gown featuring a sexy keyhole and sheer skirt.
Gabrielle Union
The actress looked exquisite in a black shimmery gown featuring a plunging neckline, sheer skirt and belted waist.
Anne Hathaway
The Les Misérables star wore a pale pink Prada gown to the Oscars ceremony to scoop up her award, and later changed to a breezy Saint Laurent blue gown with an embellished neckline for the Vanity Fair party. Which look do you prefer?
Zoe Saldana
The fashionista went for drama in 2013. For the ceremony, she wore an elegant Alexis Mabille design with an embellished neckline and two-tone hemline, and later changed to a slinky black gown with a plunging neckline.
Amy Adams
The actress dazzled in two stunning gowns, both by Oscar de la Renta in 2013. For the red carpet, Adams wore a frothy design featuring a feathered skirt, and for the after party, she selected an embellished column gown with metallic fringe details.
Jennifer Lawrence
Talk about two totally different looks! The Hunger Games star looked ladylike and classic in a strapless Dior design at the awards show, and then showed off her enviable figure in a slinky Calvin Klein dress for the festivities afterwards. Which style suits her best?
Olivia Munn
Now here's a dramatic wardrobe change! Munn rocked a regal red and gold number by Marchesa to the 2013 awards show, and then switched to a pale pink gown with a thigh-high slit by Versace Atelier Couture for the celebration afterwards.
Jennifer Lopez
J. Lo knows what she likes! In 2012, the star selected two similar gowns by Zuhair Murad for both the red carpet and the after party. The singer dazzled in curve-hugging silhouettes featuring plunging necklines, long sleeves and plenty of sparkle. Do you prefer Lopez in pale or deeper shades?
Emma Stone
The adorable actress wore a ravishing red Giambattista Valli Haute Couture gown to the 2012 Oscar Awards, and then changed to a sexy black column dress with sheer paneling for the after party. Which look do you like better?
Amanda Seyfried
The blond beauty stole the show in two captivating looks by different designers in 2013. She wore an embellished ivory gown by Alexander McQueen for the daytime festivities, and then switched to a bold red look by Givenchy for the evening.