Kristin Cavallari goes braless and wears jet black looks for

Kristin Cavallari goes braless and wears jet black looks for the seductive Uncommon James photo shoot

Kristin Cavallari looked radiant in a new promotional video for her jewelry collection, Uncommon James.

The 37-year-old entrepreneur, who discussed Sean “Diddy” Combs on her podcast, modeled new silver necklaces in sexy clips.

The footage consisted of shots of the former Laguna Beach star showing off the pieces while baring her cleavage in sexy black looks.

Cavallari, whose ex-husband is former athlete Jay Cutler, wore a black pinstripe blazer in some topless scenes.

In other shots, she was seen wearing a plunging, long-sleeved bodysuit while going pantless.

Kristin Cavallari looked radiant in a new promotional video for her jewelry collection, Uncommon James

Kristin Cavallari looked radiant in a new promotional video for her jewelry collection, Uncommon James

The 37-year-old entrepreneur modeled new silver necklaces in sensual clips

The 37-year-old entrepreneur modeled new silver necklaces in sensual clips

The mother of two's flirty blonde bob was arranged in an off-center part and had waves that grazed her collarbone.

Her curls blew in the wind as she posed for the camera, incorporating a black stool in some outtakes.

At other times, she sat on the floor and showed off bracelets and layered necklaces with cross pendants.

The former MTV personality looked stunning as usual in a face covered in gorgeous makeup that highlighted her natural beauty.

The caption of the post, shared on Uncommon James' Instagram account, read: “New styles for our Sterling Silver babes.”

Cavallari also shared the ad on her Instagram Stories on her personal social media account.

Her brand launched in 2017 and the website says she started with a mission to “create affordable jewelry that enhances personal style.”

Since its inception, the company has expanded into home goods, apparel and beauty products.

The footage consisted of shots of the former Laguna Beach star showing off the pieces while baring her cleavage in sexy black looks

The footage consisted of shots of the former Laguna Beach star showing off the pieces while baring her cleavage in sexy black looks

Kristin flaunted layered necklaces with cross pendants

Kristin flaunted layered necklaces with cross pendants

Some shots showed her wearing a belted blazer and black leather pants The mother of two's flirty blonde bob was arranged in an off-center part and had waves that grazed her collarbone

Some shots showed her wearing a belted blazer and black leather pants

Kristin celebrated her birthday last month and turned 37 on January 5th.

To mark the special occasion, she took to Instagram and shared photos of herself blowing out a single candle on a piece of dessert.

In a caption to her 4.7 million followers, she wrote: “Happy to be getting older as the years keep getting better. 'Buttttt how the hell am I 37?!!'

She added a crying laughing emoji and the post has so far garnered over 131,000 likes from her supportive fans.