Jennie Garth post-split weight loss revealed in yellow bikini at Labor Day Celebration in Las Vegas

Jennie Garth recently split from her husband Peter Facinelli after 11 years of marriage.

And since the couple announced their break-up, Jennie Garth, 40, has lost a significant amount of weight, with many conceding that she may well be another victim of the “heartbreak diet”.

And the extent of her weight loss was all too evident over the weekend, when the actress slipped into a yellow bikini to party at the Palazzo Resort & Casino Labor Day Celebration in Las Vegas.

Jennie Garth revealed a slightly protruding ribcage as she bared her torso in her two-piece attire.

With hardly an inch to pinch on the star, the blonde beauty appears to be at her slimmest.

The newly single star had a ball at the event, lapping up the attention she was getting from numerous muscle-bound hunks.

Jennie Garth appeared particularly enamored by one man who she was seen sitting next to on the ledge of the pool.

Flashing her wide smile, the pair chatted away as they enjoyed some refreshing drinks in the sun.

Jennie Garth stayed in the water for most of the day, dancing to tunes played by a DJ poolside and enjoying some girly time with friends.

At one point she took a break from the sun and hopped inside the DJ booth with fellow actor Danny Masterson, who had been spinning records throughout the day.

Earlier in the afternoon, Jennie Garth posed on the red-carpet wearing a sexy black crochet cover all over her yellow bikini.

Jennie Garth’s daughters – 15-year-old Luca, nine-year-old Lola and five-year-old Fiona – are in Hawaii with their father, Peter Facinelli, so the former 90210 star is enjoying some grown up time.

The newly single mother-of-three just began dating photographer Noah Abrams, who’s shot for Rolling Stone, Vanity Fair, Sports Illustrated, and GQ.

According to People Magazine, Noah Abrams, 33, hunk is currently directing a documentary about the Black Keys and compared the project to “a buddy comedy with the greatest soundtrack of all time” in Spin Magazine.

The flirty pair was spotted leaving a movie at Arclight Cinemas in Hollywood while holding hands and laughing last week.