Jennie Garth Unveils Thin, Toned Bikini Body in Las Vegas!

USMagazine, Sunday, September 2, 2012, 7:20am (PDT)

If you've got it, flaunt it -- and that's exactly what Jennie Garth did over Labor Day weekend.

The former Beverly Hills, 90210 actress, 40, made a splash when she donned a skimpy neon yellow bikini at Azure Pool at the Palazzo in Las Vegas September 1. The slender mother-of-three, 40, removed her black cover-up and listened to DJ MomJeans before jumping into the deejay booth herself with actors Danny Masterson, 36, and Michael Pena, 36. Garth also lounged poolside with a gaggle of girlfriends and chatted with Pretty Little Liars star Ashley Benson, 22, and Glee hottie Chord Overstreet, 23.

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Garth, who split with husband of 11 years Peter Facinelli in March, "is happier than ever," a source recently told Us Weekly. "She looks like the old Jennie!"

Dr. Eric Braverman, author of The Younger (Thinner) You Diet, recently estimated the star lost 20 pounds in the last three months. And a source told Us the slimmed-down star's waist size is now 25!

Garth opened up to Us about her recent slimdown at an Old Navy Denim Pop-Up Bar event in L.A. August 23. "I'm just taking care of myself: Eating less, exercising more, drinking a lot of coconut water," the former What I Like About You star explained.

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"I eat a lot of Greek yogurt: Greek yogurt in the morning, salads and proteins the rest of the day and maybe a cupcake if I've been a good girl," added Garth, who works out with trainer Shannon Stewart. "I don't believe in depriving yourself of things you want."

Garth -- who is developing a new sitcom with her Beverly Hills, 90210 love interest, Luke Perry, 45 -- is "feeling good in her skin," according to a pal.

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The the newly single mother of daughters Luca, 15, Lola, 9, and Fiona, 5, isn't just feeling confident about her body: she's also feeling lucky in love. (Garth romanced HGTV star Antonio Ballatore post-split and has recently been spotted out with hunky photographer Noah Abrams.) "She's been going on dates," said an insider. "She's not looking to get into anything too serious so fast."

This article originally appeared on Usmagazine.com: Jennie Garth Unveils Thin, Toned Bikini Body in Las Vegas!