Sexy Stars: Kourtney Kardashian's sheer dress, Gisele's vinyl pants and more

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Sexy Stars: Week of April 24
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Sexy Stars: Kourtney Kardashian's sheer dress, Gisele's vinyl pants and more

Sexy in silver! Gisele Bundchen turned heads at her Spring Fling book launch in a metallic cutout dress that clung to her stunning figure.

The model was spotted sipping elit Vodka cocktails and FIJI water while she danced the night away with A-list friends.

(Photo by Bryan Bedder/Getty Images for Goat Communications)

Sexy mama! Kourtney Kardashian, 37, looked drop-dead gorgeous in a gauzy, sheer black lace dress that exposed some skin. Casual, flowing locks, sexy sandals and simple makeup completed her effortless look.

(Photo by John Parra/GC Images)

Hello, gorgeous! Gisele Bundchen, 35, wowed on the "Tonight Show" in outrageously sexy patent leather pants, which was offset by a cozy gray crewneck sweater and flirty high ponytail ... Sure beats the typical bandage dress and pumps combo!

(Photo by: Andrew Lipovsky/NBC/NBCU Photo Bank via Getty Images)

Nick Jonas, 23, surprised fans with a pop-up performance at a workout class in Venice Beach this week -- and looked totally dapper in black sinnies, shoes and a navy bomber jacket. Talk about sexy ... the "Jealous" singer definitely wasn't the only one who needed to rehydrate with Propel water!

(Propel Co:Labs)

Elizabeth Olsen, 27, channeled old Hollywood glamour in a gorgeous off-white long-sleeved gown with a keyhold chest cutout that flaunted a touch of cleaves. A middle-parted 'do and dark red lips completed her stunning ensemble.  

(Photo by Karwai Tang/WireImage)

"Revenge" actress Emily VanCamp, 29, looked absolutely lovely in a gorgeous red peplum dress with a ruffled skirt and crossed ribbon-like accent on the bodice. A shiny blowout and nude heels completed her refreshing look.

(Photo by David M. Benett/Dave Benett/WireImage)

Shay Mitchell, 29, looked sexy and sophisticated a plunging black midi dress. An on-trend choker added a modern touch to the classic silhouette.

(Photo by Daniel Zuchnik/WireImage)

Mischa Barton, 30, stunned in a black and white minidress with an asymmetrical hem.  

(Photo by Jason LaVeris/FilmMagic)

Adriana Lima, 34, wowed in a simple white minidress and sexy black stilettos.

(Photo by Aaron Davidson/FilmMagic)

Rosie Huntington-Whiteley, 29, looked totally upscale in simple black slacks, black shirt and black blazer. Chic accessories like a black leather bag, strappy sandals and simple sunnies completed her knockout look.

(Photo by Raymond Hall/GC Images)

Emmy Rossum, 29, was a breath of fresh air in a simple white knee-length dress and white heels.

(Photo by Jeffrey Mayer/WireImage)

Actress Katherine McNamara, 20, wowed in a simple black jumpsuit that allowed her fiery locks to really pop.

(Photo by Tommaso Boddi/WireImage)

"Girls" actress Jemima Kirke rocked a lingerie-esque lacy LBD.

(Photo by Robin Marchant/Getty Images)

Paris Hilton, 35, looked better than ever in a gorgeous, sheer minidress with delicate black floral embroidery. Black booties and a sleek blowout completed her fabulous ensemble.  

(Photo by Mark Robert Milan/GC Images)

Model Romee Strijd, 20, turned heads in simple light-wash jeans, a white cropped tee, sneakers and an on-trend bomber jacket.

(Photo by Michael Stewart/Getty Images)

Lindsey Vonn, 31, flaunted her taut backside in a form-fitting yellow gown with silver accents.  

(Photo by Andrew Toth/FilmMagic)

Melania Trump, 46, wowed in a modern white gown with a sexy slit and silver accessories.

(Photo by Dimitrios Kambouris/Getty Images for Time)

Shay Mitchell wowed in a plunging white blouse tucked into a sexy leather mini. 

(Photo by: KGC-146/STAR MAX/IPx 4/25/16)

Rosie Huntington-Whiteley looked runway ready in a stunning satin peach wrap.

(Photo by Robert Kamau/GC Images)

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Sexy mamas!

Kourtney Kardashian, 37, put her hot revenge bod on display in a gauzy, sheer black lace Nina Ricci dress that exposed some skin. (Similar here and here.) Casual, flowing locks, sexy sandals and simple makeup completed her effortless look.

Mother-of-two Gisele Bundchen also turned heads this week in another hot look. The 35-year-old model wowed on the "Tonight Show" in outrageously sexy vinyl pants, which was offset by a cozy gray crewneck sweater and flirty high ponytail ... Sure beats the typical bandage dress and pumps combo! (Shop similar pants here and here.)

SEE ALSO: Kylie Jenner sizzles in her sexiest bikini snap yet

It wasn't all about the ladies this week. Nick Jonas, 23, surprised fans with a pop-up performance at a workout class in Venice Beach this week -- and looked totally dapper in black skinnies, shoes and a navy bomber jacket. Talk about sexy ... the "Jealous" singer definitely wasn't the only one who needed to rehydrate with Propel water!

See these looks and more in the slideshow above.

Shay Mitchell on Her Mother

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