Sexy Stars: Emily Ratajkowski, Alessandra Ambrosio and more stun in sultry styles

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Sexy Stars: Week of Aug. 7
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Sexy Stars: Week of Aug. 7

Christina Milian left little to the imagination in a sheer, booty-baring mesh dress that flaunted her backside.

(Photo by JB Lacroix/WireImage)

The front of the unique frock featured exposed boning, a bustier top with minimal coverage and a peplum skirt.

 (Photo by JB Lacroix/WireImage)

Emily Ratajkowski has no qualms about showing off her body -- and she did just that at RatPac Entertainment’s event at Hilhaven Lodge honoring the United Nations Secretary-General Ban Ki-moon when she slipped into a barely-there red backless, ultra-short minidress that exposed her bare back and a touch of sideboob.

(Photo by Steve Granitz/WireImage)

The front of her dress dipped low to expose her ample cleavage. Silver floral embroidery and a dramatic, floor-length scarf detail added a romantic touch.

(Photo by Jason LaVeris/FilmMagic)

Sharon Stone oozed sex appeal at the same event in a champagne floor-length nightie and luxe sweater.

(Photo by Jason LaVeris/FilmMagic)

Alessandra Ambrosio flashed her washboard abs in a sexy black striped two-piece ensemble with culotte pants and a spaghetti strap crop top. Sky-high leather sandals and a pendant necklace completed her hot look.

(Photo by Pascal Le Segretain/Getty Images for Coca-Cola)

Rita Ora showed off her enviable figure in a loud, bright red turtleneck catsuit that hugged her curves. A messy bun, hoop earrings and simple sandals completed her head-turning look.

(Photo by Robert Kamau/GC Images)

Nicole Scherzinger was white-hot in a sexy white two-piece number.

(Photo by Jason LaVeris/FilmMagic)

Who says you need to show skin to be sexy? Louisa Gummer looked killer in a black silk blouse, black slacks and siren red lips.

(Photo by Paul Zimmerman/WireImage)

Cat Deeley was a classic beauty in white jeans, a crisp buttondown, Celine bag and camel heeled sandals.

(Photo by BG002/Bauer-Griffin/GC Images)

Actress Elaine Hendrix turned heads in a form-fitting red suit with a plunging neckline and nothing underneath. She styled her look with nude heels, red lips and an edgy, slicked-back 'do.

(Photo by Amanda Edwards/WireImage)

Actress Elizabeth Gillies donned a cute white two-piece and matching knee-length vest. Gorgeous hair and makup and a simple metallic cuff completed her look.

(Photo by Matt Winkelmeyer/Getty Images)

Lucy Fry looked perfectly summery in a simple white skirt, ribbed pink crop top and blue pumps. Pink, blue and white details on her clutch picked up the hues of her outfit perfectly.

(Photo by JB Lacroix/WireImage)

Laverne Cox stunned in a sexy white cold shoulder top and matching pumps. A diamond cuff, purple lips and pin-straight locks completed her look. (Photo by Jon Kopaloff/FilmMagic)

Katherine Heigl looked lovely in a knee-length three quarter sleeve white dress with a sexy cutout at the chest that revealed a touch of cleavage.

(Photo by Jon Kopaloff/FilmMagic)

Jillian Murray wowed in a strapless, striped midi tea dress.

(Photo by JB Lacroix/WireImage)

Ali Larter was a total blonde bombshell babe in a neutral colorblocked bodycon dress and sexy sandals.

(Photo by JB Lacroix/WireImage)

 Stephanie Pratt stunned in a gorgeous printed midi dress and multi-colored metallic heels. A shiny 'do and neutral makeup completed her pretty look.

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

"Suicide Squad" star Karen Fukuhara killed it in a leather minidress with a lace panel. 

(Photo by David Livingston/Getty Images)

EAST HAMPTON, NY - AUGUST 12: Christie Brinkley attends the 2016 Chefs & Champagne For Elephants at The Baker House 1650 on August 12, 2016 in East Hampton, New York. (Photo by Steven A Henry/Getty Images)
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Red-hot!

Emily Ratajkowski has no qualms about showing off her body -- and she did just that when she slipped into a barely-there backless, ultra-short minidress that exposed her bare back and a touch of sideboob. The front of her dress dipped low to expose her ample cleavage. Silver floral embroidery and a dramatic, floor-length scarf detail added a romantic touch.

Rita Ora also rocked the sexy hue this week in a crimson turtleneck catsuit that hugged her curves. A messy bun, hoop earrings and simple sandals completed her head-turning look.

Model Alessandra Ambrosio ditched the hot color -- but still looked sexier than ever -- in a black striped two-piece ensemble with culotte pants and a spaghetti strap crop top that flashed her washboard abs. Sky-high leather sandals and a pendant necklace completed her hot look.

See these looks and more in the slideshow above.

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