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Kimora Lee Simmons clearly isn't drowning herself in ice cream and chocolates after her split from Djimon Hounsou -- look at that body!

The 37-year-old mother of three showed off her impressive breakup bod on the beaches of St. Bart's this week, hitting the sand in a skimpy red bikini while vacationing with her two daughters with Russell Simmons, Ming and Aoki.

No sign of little Kenzo, who must have been spending the holidays with his dad, Djimon.

This is one of the first sightings of Kimora since she and Hounsou announced they separated after five-and-a-half years together ... and she looks great!

The couple revealed they were separated for some time right before Thanksgiving, with Kimora tweeting "We have remained happy, loving, co-parenting friends+family. We all have much to be thankful for."

Like that physique, right?! Check out more celebrity beach bods in the gallery above.

And see more shocking celebrity splits of 2012 here.