Here's hoping St. Nick made a pit stop in St. Barts on Christmas -- because that's where Kimora Lee Simmons and her kids spent this year's holiday! A year after she and Djimon Hounsou announced their split, the fashion designer, 38, escaped the cold climes of the NYC area for a Caribbean getaway. "Happy Holidays! My Rugrats in tow, Ready to Go! #WheelsUp! #StBarths #Fabulosity," she tweeted recently. 

On Christmas Eve, Simmons showed off her still-impressive bikini body in a black-and-white two-piece as she frolicked in the surf with daughters Aoki, 15, Ming, 13, and son Kenzo, 4, at Nikki Beach. (Aoki and Ming are her kids with ex-husband Russell Simmons, while Kenzo is her child with ex-partner Hounsou; she and the model-turned-actor, 49, announced their split in late 2012 after 5 years together.)

On Christmas Day itself, Simmons was on the beach in another bikini, this one peach-toned, as she walked on the wet sand with a thin, bald mystery man -- identified by some outlets as a new boyfriend. No other details about Simmons' new pal were immediately available.

"I'm not with anyone at the moment," Simmons told the Daily Mail last March. "It's just my kids and their two dads, I guess."

She admitted that some men have "hang ups" about dating women with successful careers. "They have a lot of insecurities about who we are, what we have, what we look like, what we've accomplished and what we're capable of because we're fabulous and capable of doing so much and juggling so much every day," the model said.