Sexy Stars: Naomi Campbell has one of the sexiest looks of the week in plunging dress

Talk about sexy stars!

Julianne Hough put her best foot forward over the weekend in a power blue dress with a slit up-to-there. The "DWTS" star is no stranger to showing off her dancing legs, but she looked out of this world this week with this style.

Model Naomi Campbell flaunted her enviable figure in a jaw-dropping dress with a plunging sheer neckline at New York Fashion Week this week. The 46-year-old's sequined gown was by far one of the hottest looks of the week, but she was nearly challenged by some close sexy contenders.

Natalie Portman, who just revealed she's expecting baby No. 2, wowed in back-to-back looks this week at the Venice Film Festival. The expectant momma rocked a black and white number with a pretty neckline and also donned a figure-hugging, white gown that revealed her growing baby bump.

Model Karlie Kloss was also on a hot streak this week, rocking a backless, silver, sequined gown and some sultry makeup.

From New York Fashion Week to the Venice Film Festival, there were tons of incredible ensembles worth talking about this week.

Check them all out below:

Sexy Stars: Week of September 5
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Sexy Stars: Week of September 5

Julianne Hough took things to the next level in a powder blue dress with a daring slit! The gown, which featured pin-like details down the side fit her like a glove. She polished off the look with matching pumps in oder to attend the 6th Annual Celebration Of Dance Gala Presented By The Dizzy Feet Foundation. (Photo by Steve Granitz/WireImage)

 Wowza! Model Naomi Campbell definitely turned heads at New York Fashion Week in a sequined number with a plunging, sheer front. The 46-year-old literally was oozing sex appeal in the outfit. 

(Photo by Taylor Hill/FilmMagic)

Not only did Natalie Portman show off her brand new baby bump -- she's expecting baby No. 2 -- she also was a total knockout in this blush, one-shoulder dress. A pop of red on her lips added a touch of subtle sophistication. 

(REUTERS/Alessandro Bianchi)

Knockout times two! Natalie Portman looked just as lovely in a black and white number earlier in the week at the Venice Film Festival. The black and white pattern paired with her smoky eyes was sultry and gorgeous. 

REUTERS/Alessandro Bianchi

Who doesn't love a fairytale? Katie Holmes showed off her whimsical side in a nude, tulle gown embellished with patterns of flowers, branches, moons, butterflies and more. She added a bit of spunk to her look with a set of hoop earrings and bright lipstick. 

REUTERS/Andrew Kelly

Just a little flash! Rooney Mara was equal parts edgy and sexy in an all-black outfit that was sheer throughout paired with a cropped leather jacket. 

. REUTERS/Andrew Kelly

Musician Ellie Goulding was pretty as can be in a lace emblazoned dress with a plunging neckline at the Cartier event. 

 REUTERS/Andrew Kelly

Sienna Miller dazzled in a light blue dress with sheer panels in the bodice. The flowing and bohemian dress was a definite winner. 

 (Photo by Steven A Henry/WireImage)

Actress Suki Waterhouse hit the premiere of "The Bad Batch" in a sparkling pink dress with bold embellishments. The figure-hugging gown definitely added a bit of razzle-dazzle to the Venice Film Festival. 

 (Photo by Andreas Rentz/Getty Images)

Amy Adams brought plenty of old Hollywood glamour to the red carpet at the Venice Film Festival. Adams rocked a one-shoulder, sequined gown that was worthy of an award.

Hottest couple on earth? Rande Gerber and model Cindy Crawford hit the Tom Ford show at NYFW and Cindy literally looks better at every event. We can't get enough of her white, column dress with a plunging neckline. 

(Photo by Frazer Harrison/Getty Images)

Model Karlie Kloss definitely put her back into it as she headed into the Tom Ford show at the NYFW. The sexy, low back gathered in all the right places.

 (Photo by Presley Ann/Patrick McMullan via Getty Images)

Sometimes it is all about simplicity. Victoria Beckham went for a classic ensemble of a red sweater and bright blue trousers and it was one of our favorite looks yet. 

 (Photo by Raymond Hall/GC Images

The slip dress is always a good idea and Cat Deeley played it just right rocking a nude slip and bouncing blonde curls as she hit Jimmy Kimmel's show. 

 (Randy Holmes/ABC) CAT DEELEY

Like a boss! Bella Hadid kept her look simple for the GQ Men of the Year Awards in London in a nude off-the-shoulder dress with a thigh-high slit. She added a touch of glam to her look with a diamond choker and ring. 

 (Photo by Jeff Spicer/Getty Images)

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