Last year's Oscars ensembles [1] were all sorts of sexy, and things got even steamier once the afterparties started [2]. From plunging necklines and thigh-high slits to full-on bare booty, we saw plenty of looks that left little (if anything) to the imagination. Scroll through to see every smoldering look — worn by Hollywood's hottest stars like Sofia Vergara, Miranda Kerr [3], and Emma Stone [4] — and if the lyrics to Beyoncé's "Naughty Girl" pop into your head, just know you aren't alone.
Rosie Huntington-Whiteley
Rosie Huntington-Whiteley looked ferocious in a slinky, sparkling Alexandre Vauthier dress with side cutouts at the Vanity Fair afterparty.
Jennifer Aniston
Jennifer Aniston [5] showed some skin in a sheer beaded Versace dress on the Oscars red carpet.
Miranda Kerr
Miranda Kerr [6] channeled Old Hollywood in a sexy sparkling cutout dress at the Vanity Fair afterparty.
Jennifer Lopez
Jennifer Lopez [7] shimmered and sparkled in a nude sheer dress with an ultralow neckline at the Vanity Fair afterparty.
Rosamund Pike
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
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
Lily Collins caught our attention in a tuxedo-style dress with a sheer bottom and sleeves at the Vanity Fair afterparty.
Chrissy Teigen
Chrissy Teigen arrived at the Oscars in a low-cut Zuhair Murad gown that also featured a superhigh slit.
Malin Akerman
Malin Akerman kept nothing hidden in a revealing black lace dress at the Vanity Fair afterparty.
Emma Stone
On the red carpet, Emma Stone [8] donned an Elie Saab dress that was sexy from every angle thanks to its open back and superhigh slit.
Rita Ora
Rita Ora bared her booty in a sheer black Donna Karan dress with a long train at the Vanity Fair afterparty.
Gigi Hadid
Gigi Hadid caught our attention in a unique one-shouldered dress with a superhigh leg slit at Elton John's viewing party.
Sofia Vergara
Sofia Vergara showed off her curves in a bustier-top, beaded gown at the Vanity Fair afterparty.
Heidi Klum
Heidi Klum [9] dared to bare a lot of skin in a silver cutout gown at Elton John's viewing party.
Naomi Watts
Naomi Watts [10] showed some skin in a back-baring dress on the Oscars red carpet.
Joan Smalls
Joan Smalls kept it creative in a sheer-legged jumpsuit that featured creative cutout panels at the Vanity Fair afterparty.
Nina Dobrev
Nina Dobrev [11] looked red hot in a bold Reem Acra with side cutouts at the Vanity Fair afterparty.
Jenna Dewan Tatum
Jenna Dewan Tatum looked sleek and sexy in a black halter dress with a revealing thigh slit at the Vanity Fair afterparty.
Hannah Davis
Hannah Davis made a suit feel ultrasexy at the Vanity Fair afterparty.
Margot Robbie
Margot Robbie went for a plunging neckline in this black Saint Laurent gown on the Oscars red carpet.
Karlie Kloss
Karlie Kloss donned an edgy black dress with a sheer bottom at the Vanity Fair afterparty.
Petra Nemcova
Petra Nemcova stunned in a shining blue Marchesa dress with a lacy top at the Vanity Fair afterparty.
Chanel Iman
Chanel Iman showed off her underwear in a beige-colored sheer dress at the Vanity Fair afterparty.
Zoe Kravitz
Zoe Kravitz opted for a see-through dress at the Vanity Fair afterparty.
Lady Gaga
Lady Gaga [12] made a statement in a sheer black dress with a full train at the Vanity Fair party.