Hot Bodies

There is a MAJOR Rebecca Black crisis on Facebook -- with allegations of deception, identity theft ... and most importantly a smoking hot bikini model ... who happens to be named Rebecca Black.

Turns out, there's more than one person on Earth named Rebecca Black -- one of whom is a self-described, "fitness bikini competitor." And she has the photos to prove it.

Black (bikini) tells TMZ ... sometime in the past week, her friend list on Facebook exploded from 800 friends to 73,000 ... and she had no idea how it happened. Black started getting emails from upset fans of the singer -- accusing her of intentionally hijacking the 14-year-old's page ... but Black (bikini) claims she never tried to steal anyone's identity.

Black (bikini) insists Facebook is to blame for somehow "merging" her account with Black's (singer) without her permission.

We called Facebook for comment -- so far no word back.

Floyd Mayweather's next opponent is the total package ... in more ways than one ... and last week, he let it all hang out in a SUPER-REVEALING underwear photo shoot ... and TMZ has the pics.

WBC World Welterweight Champion Victor Ortiz is now the spokesman for an underwear site called Freshpair.com -- and as part of the deal, the 24-year-old agreed to model some of his favorite undies.

Mayweather is a HUGE favorite in the Sept. 17 fight -- but Ortiz is clearly the knockout.

Chaz Bono toned up for his big debut on "Dancing With The Stars" by hitting the gym in West Hollywood Saturday.

TMZ broke the story ... Chaz will be a celebrity contestant on the show and will be paired with a female dancer ... a stroke of genius on the part of the producers.

Two-time Oscar winner Hilary Swank showed off her toned bod in a black two-piece in Kauai on Thursday.

Boys don't cry when they see the 37-year-old in a bikini.

Bishop Don "Magic" Juan -- Snoop Dogg's spiritual advisor -- left a permanent mark on himself the other day ... tatting up his arms with some brand new ink ... and we got the pimptastic pics.

The procedure took place on Monday inside Bishop's L.A. home -- and no, your eyes don't deceive you ... one of the tats reads "Let the Chuuuch $ay Amen."

The other reads "333" -- and we're told the numbers are significant because they were handed down to him by God. Go figure.

Apparently, Bar Refaeli has started a trend ... because just a few weeks after the Israeli model dipped herself in mud at the famous Dead Sea ... some smokin' hot Brazilian model tried to show her up.

Model Suelyn Medeiros (left) -- whose butt you may recognize from the SEXIEST DUI EVER -- mucked around in Israel this week ... and fortunately for the rest of the world, she brought along a bathing suit and a camera.

So we gotta ask ...

Megan Fox left little to the imagination by rocking a tight, form-fitting mini dress in L.A. on Monday.

It's been 14 years since "My Best Friend's Wedding," but Dermot Mulroney proved he's still got the bod of a newlywed by going on a shirtless run and showing off his buff chest and abs in Santa Monica this weekend.

After winning some sort of "celebrity" boxing event in Fort Lauderdale this weekend, Octomom Nadya Suleman showed off what a shark attack giving birth to eight kids at once will do to your body.

She's scarred for life.

Trading her meat dress for a wet suit, Lady Gaga followed in Lindsay Lohan's footsteps and went surfing in Mexico on Tuesday.

Gaga stripped down to a bikini and was actually able to stand up on the surfboard.

Wearing a form-fitting green one-piece bathing suit, "Law & Order: SVU" star Mariska Hargitay cooled off in the Hamptons on Wednesday.

Life's a beach for Detective Benson.

The L.A. Galaxy just signed Irish National Team captain Robbie Keane to play alongside David Beckham. But it's Keane's smokin' hot wife Claudine Keane who will be waging a hot body bikini battle with David's wife Victoria Beckham.

Question is ...

A day after going topless, supermodel/mother of four Heidi Klum celebrated covering up on the beach by chugging down a Corona in Italy on Monday.

So that's how she keeps her sexy girlish figure.

An ecstatic Heidi Klum let it all hang out in Sardinia, Italy this weekend by going topless on the beach.