Stars In Heat

No fetus is gonna slow Simon Cowell's roll -- the "X Factor" judge is still partying his ass off on a yacht in the French Riviera ... with bikini-clad women ... while his pregnant baby mama is waging her divorce war back in New York.

A shirtless Simon and his mystery blonde were photographed just hours ago, soaking up the rays on France's Mediterranean coast ... not a care in the world.

Meanwhile, Simon's baby mama Lauren Silverman is toughing out nasty divorce proceedings with her estranged husband.

More than THREE DECADES after he went topless in "Fast Times at Ridgemont High," Sean Penn struck a Spicoli pose in Spain ... and proved he's more JACKED than ever.

Check out this pic of Sean back in 1982 -- when he was 21 years old -- and then make a decision.

Here's Rihanna in Barbados ... kicking a soccer ball in her teeny, tiny, Rihanna-sized bikini.

Barbados Fun Fact -- Soccer is NOT the most popular sport in the country. According to the Internet, which is almost always accurate, Bajans LOOOOOVE cricket -- they're obsessed with it.

If you're unfamiliar with cricket ... it's like baseball with sweaters. Also, the fights are better in baseball. Need proof? Here's Nolan Ryan beating up Robin Ventura. Enjoy!

They're the stars of the BIGGEST sex tapes of ALL TIME ... and now, it seems Pam Anderson and Rick Salomon are back on in a big way.

Pam (who famously tamed Tommy Lee's mega-penis on a boat) was spotted out with Rick (who famously spent 1 Night in Paris) on the beach in Hawaii this week during a romantic getaway.

Sources tell us Pam and Rick -- who were married from 2007 to 2008 -- have been spending a lot of time together in the past couple of months ... and are virtually inseparable.

We're told they're both "very into health and fitness" -- and as you can see by Pam's body, it's working.

Damn.

LeBron James has his chalk toss ... Metallica's got their band huddle ... we're pretty sure Justin Bieber kisses a photo of himself -- but the greatest pre-show ritual of all time definitely belongs to pro surfer babe Anastasia Ashley.

The video was shot over the weekend at the Supergirl Pro in Oceanside, CA -- and while Ashley didn't even come close to winning the competition, she definitely won our hearts.

Sorry, Miley Cyrus. You've been replaced. Thanks to Vidhuntr for the clip.

Charlie Sheen's Goddess-less days are over ... the warlock has found three NEW porn star girlfriends -- but this time he's calling them "Angels". Get it, like "Charlie's Angels".

TMZ obtained pics of Charlie and his harem vacationing in Hawaii recently. Keeping to the theme, he chose a blonde, a brunette and a ginger -- who go by JL, JJ, and CS. Who knows which is which.

From the pics it's clear Charlie had a great time with his ladies -- probably because they were topless.

We're told the orgy party didn't stop in Hawaii either ... the XXX stars are now shacking up with Sheen in L.A. ... kind of like it's 2011 all over again.

Forget Monday ... TODAY IS OFFICIALLY BUNDAY ... thanks to Victoria's Secret model Doutzen Kroes, who graced the world with her bikini-clad backside in Ibiza just hours ago.

Apparently, Doutzen's husband was there too. Yeah, we didn't care either.

Forget babies, food and cat photos -- these stars were so proud of their bronzed backsides they took to the interweb to shared their beachin' butts!

Can you guess which sexy stars are the proud owners of these perfect posteriors?

Britney Spears and her giant breasts (who knew?) know no fear -- because she braved the potentially less-than-pristine pools of a water amusement park for TWO straight days!

She better pray it's #1, and not #2 ... rated.

Britney Spears LOOOOVES herself some waterslides and lazy rivers ... 'cause the pop star threw on a couple of bikinis this week and hit up a Southern California waterpark -- 2 days in a row!

TMZ obtained pics of Brit -- along with her kids -- at Six Flags Hurricane Harbor in Valencia, CA on Wednesday where Ms. Spears showed off her hardbody physique in a bright pink bikini.

Brit was also spotted at the park on Tuesday ... 'cause as everyone knows, ya can't hit up all the rides in just one day!

The dreaded high-waisted bikini strikes again!!! Just days after Taylor Swift terrified the nation with some grandma's dusty old swim-diaper ... Snooki subjected her OWN DEFENSELESS CHILD to the horrific ensemble.

The pics were snapped Monday on the beach in Seaside Heights -- aka "Jersey Shore" mecca -- and luckily, Snooki's baby daddy Jionni LaValle was there to distract 11-month-old Lorenzo for long enough that he didn't go blind.

It's a battle of the beltlines!

Here's 23 year-old pop sensation and paddle board amateur Taylor Swift in the Atlantic Ocean (left) ... and 23-year-old Weiner sext-pert Sydney Leathers along the Pacific Ocean (right) -- BOTH rocking high-waisted bikinis recently.

Taylor Swift's new bikini is totes adorable according to ladies -- while in the eyes of guys ... it's the ugliest female-figure-ruining thing since your grandma hit the beach in the 1930s!

This ... means war.

Sydney Leathers is now going public with the body she once privately photographed for Anthony Weiner ... in a bikini photo shoot that begs the question: was she really worth it, Mr. Weiner?

The striped, belly button-covering bikini Taylor Swift rocked out in Rhode Island this weekend is DIVIDING THE COUNTRY ... or at least the TMZ newsroom.

We know Shakira's hips don't lie, but her ass is another story -- because even though she put on a sexy g-string to hit the beach in Hawaii ... she kept her goods under wraps!

Why so cruel, Shakira? TMZ investigates!