"Real Housewives of Orange County"
star Gretchen Rossi brought her bikini bod to Vegas!

Over the weekend, the blonde beauty hosted the World's Largest Bachelorette Party at TAO Beach in Sin City.

Rossi was joined by her fiance Slade Smiley for the festivities, and the two even re-enacted their proposal for the fans -- Slade got down on one knee as he presented Gretchen with a giant diamond.


The blonde beauty flaunted her envious bikini bod in a pink two-piece from her Gretchen Christine for LUXE line as she partied with a lucky group of bachelorettes and Chippendales dancers!

After partying it up at the pool, Gretchen and Slade hit up TAO Bistro for dinner and then finished their night at TAO Nightclub.

Looks like the "Housewives" star had one wild weekend! Wonder which of her O.C. costars she'll bring to her own bachelorette party?

Click "Launch Gallery" above to see more celebrity beach bods!

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