Mark your calendars: Friday Jan. 29 is the 35th birthday of Rachel Uchitel, the very first woman publicly branded "Tiger Woods' mistress" just before Thanksgiving 2009.

And Uchitel -- reports of her affair allegedly led to a Nov. 27 blowout between Woods and his wife Elin and an ensuing car crash -- isn't celebrating her special day quietly. The Manhattan club promoter will be partying with friends and "Celebrity DJs" at the club 251PB in Palm Beach, Fla. (where she's been staying, with her grandmother, since early December).

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In the invitation acquired by, the newly famous Uchitel, trumpeted as a "Celebrity Socialite," gives a half-grin as she sits in casual, super-short shorts.

When asked about her alleged romantic involvement with Woods, 34, Uchitel has said "no comment." Back in December, sources told Us Weekly that Woods paid Uchitel $3 million to stay quiet about their affair, but the golfer was still seriously smitten.

"Rachel said he told her he was going to leave his wife for her, that he needed to be with her," a Uchitel source told Us.