25 Looks From Last Year's Oscars That Practically Reinvented the Word Sexy

Rosie Huntington-Whiteley looked ferocious in a slinky, sparkling Alexandre Vauthier dress with side cutouts at the Vanity Fair afterparty.

Jennifer Aniston showed some skin in a sheer beaded Versace dress on the Oscars red carpet.

Miranda Kerr channeled Old Hollywood in a sexy sparkling cutout dress at the Vanity Fair afterparty.

Jennifer Lopez shimmered and sparkled in a nude sheer dress with an ultralow neckline at the Vanity Fair afterparty.

Rosamund Pike turned up the heat in a curve-hugging Givency dress that featured a thigh-high slit on the Oscars red carpet.

Gigi Hadid wasn't afraid to bare it all in a swirled sheer Versace dress with an ultrasexy slit at the Vanity Fair afterparty.

Lily Collins caught our attention in a tuxedo-style dress with a sheer bottom and sleeves at the Vanity Fair afterparty.

Chrissy Teigen arrived at the Oscars in a low-cut Zuhair Murad gown that also featured a superhigh slit.

Malin Akerman kept nothing hidden in a revealing black lace dress at the Vanity Fair afterparty.

On the red carpet, Emma Stone donned an Elie Saab dress that was sexy from every angle thanks to its open back and superhigh slit.

Rita Ora bared her booty in a sheer black Donna Karan dress with a long train at the Vanity Fair afterparty.

Gigi Hadid caught our attention in a unique one-shouldered dress with a superhigh leg slit at Elton John's viewing party.

Sofia Vergara showed off her curves in a bustier-top, beaded gown at the Vanity Fair afterparty.

Heidi Klum dared to bare a lot of skin in a silver cutout gown at Elton John's viewing party.

Naomi Watts showed some skin in a back-baring dress on the Oscars red carpet.

Joan Smalls kept it creative in a sheer-legged jumpsuit that featured creative cutout panels at the Vanity Fair afterparty.

Nina Dobrev looked red hot in a bold Reem Acra with side cutouts at the Vanity Fair afterparty.

Jenna Dewan Tatum looked sleek and sexy in a black halter dress with a revealing thigh slit at the Vanity Fair afterparty.

Hannah Davis made a suit feel ultrasexy at the Vanity Fair afterparty.

Margot Robbie went for a plunging neckline in this black Saint Laurent gown on the Oscars red carpet.

Karlie Kloss donned an edgy black dress with a sheer bottom at the Vanity Fair afterparty.

Petra Nemcova stunned in a shining blue Marchesa dress with a lacy top at the Vanity Fair afterparty.

Chanel Iman showed off her underwear in a beige-colored sheer dress at the Vanity Fair afterparty.

Zoe Kravitz opted for a see-through dress at the Vanity Fair afterparty.

Lady Gaga made a statement in a sheer black dress with a full train at the Vanity Fair party.