Hot Bodies

It's a stripped down battle of the buns!

Here's Justin Bieber (19) live and unclothed during a Thanksgiving serenade to his grandma (left) ... and Harry the Prince of Wales (28) wearing nothing but the family jewels during a naked billiards party in Vegas (right).

Justin Bieber is wise enough to know when a gift needs givin' ... but he didn't have a box -- so he covered his junk with a guitar and jammed out a naked serenade for one lucky lady fan -- HIS GRANDMA!

TMZ has obtained photos of a completely nude Biebs strumming away on his big wooden instrument ... at his grandmother's home in Toronto during Thanksgiving back in November 2012.

And why, you ask, did Bieber go ass naked for g-ma?

Our sources tell us JB had been staying at his granny's house during the holiday ... and slept in a little too late on Thanksgiving morning.

Bieber finally woke up after hearing family and friends stirring around the house -- so he thought he'd prank 'em ... by grabbing his guitar and playing a naked set a la Jenny from "Forrest Gump" ('memba that?).

We're told birthday-suited Bieber went right up to his grandma and started belting out some impromptu lyrics ... like, "I Loooove you grandmaaaa ... how are youuuu ... helloooo grandma."

We're told G thought it was pretty funny -- and everyone in the home was cracking up -- but granny begged the pop star to get back in his room to put some damn clothes on, stat.

Thanksgiving -- they go balls out.

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.

Lady Gaga finally got naked ... FULLY NAKED ... but it's weird. Really weird.

The video just surfaced, featuring a naked, hairless, crystal-spooning Gaga doing a meditation exercise inspired by Marina Abramovic, a famous performance artist.

The video shows Gaga doing "The Abramovic Method," which supposedly heightens physical and mental awareness.

One is beautiful ... one is brilliant ... and they're all bangin' Charlie -- at least, that's the presumption because Mr. Sheen's new "angels" are all well versed in the art of screwery, TMZ has learned.

After some hardcore research -- and we mean HARDCORE -- we've finally identified all three of Charlie's new lady friends ... and, shocker, they're all veteran porn stars.

Ladies and gentlemen ... but mostly gentlemen ... meet (from left to right) Jayme Langford, Jana Jordan and Celeste Star.

A few fun facts about Charlie's Angels:

- Jana Jordan has starred in more than 100 adult films including Power Munch 3 & 5 ... and she's been nominated for a ton of AVN awards.

- Celeste Star doesn't just act in porn ... she's also a porn director ... although she currently only has one film under her belt.

- Jayme Langford studied bio-ethics at the University of Judaism in Los Angeles. UJ officials pulled her financial aid though after discovering she had starring roles in a bunch of porn flicks.

Bonus Fun Fact: The blonde and the redhead have shot at least 2 sex scenes TOGETHER. There might be more ... but our computers are gonna go blind if we continue to research.

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.

Britney Spears put God fearing men to the test by wearing a super slutty outfit to church -- thereby daring everyone to block out their impure thoughts.

Guess that wasn't the last temptation, after all.

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?

Justin Bieber came out smelling -- and looking -- like a rose in NYC after hitting up a tattoo parlor for fresh ink last night.

Justin's left arm is one step closer to a full sleeve today ... after getting a blooming rose on his elbow to fill in an awkward bare spot.

The Biebs was even nice enough to pose for pics with some fans waiting outside the ink shop.

Still ... we gotta give him 3 douche points for the sunglasses at night.

Lindsay Lohan can take a joke -- even when she's the butt of it ... and she wasted no time teeing off on her latest rehab stint while guest hosting "Chelsea Lately."

Linds just wrapped her first gig since getting out of rehab on Tuesday -- and sources inside the show tell us she freely cracked jokes like, "I've been on a 90-day court ordered vacation."

In LiLo's defense ... she probably didn't write the jokes.

We're told Lindsay also busted on Chelsea Handler for drinking too much -- and overall was "very funny" ... especially during the round table segment with comedians Jen Kirkman and Fortune Feimster.

Linds also got some eye candy for her troubles -- getting to interview Dylan Bruce from the BBC show "Orphan Black."

Don't say Chelsea never did anything for you, Lindsay.