Celebrity Boobs

Scout Willis walked around New York City completely topless ... not for fun or comfort, but to protest Instagram's policy when it comes to female nudity.

Using the popular hashtag #FreeTheNipple, Willis posted photos and a series of tweets on Tuesday to voice her outrage over Instagram's rules about female nudity. She captioned the photos "Legal in NYC but not on @instagram."

Scout also posted a photo of a barely covered (and rather buxom) woman from Dan Bilzerian's infamous Instagram and said ... "@instagram pictures of breast cancer survivors have been flagged+deleted but this is super #sick and #hot amiright???"

Kim Kardashian took her girls out for the bachelorette party ... and at least one of 'em whipped out her girls -- yes, we're talking boobs.

KK and 7 other chicks -- including BFF Brittny Gastineau -- rolled up to the Louvre last night to take group pics, but in this video makeup artist Joyce Bonelli totally jacked the spotlight.

Or at least her rack did.

Kim's sisters passed on the Louvre fun -- but they were with the group for dinner earlier in the evening. They shoulda picked the Louvre.

It was a little chilly at Staples Center last night ... just ask Rihanna.

While the Oklahoma City Thunder/Los Angeles Clippers game was the main attraction, the real show was going on in the stands ... where a braless RiRi strutted around throughout the game.

With her pink hair and a tight white tank top, she made the night more memorable than Blake Griffin and Chris Paul did.

Supermodel Irina Shayk tried to call attention to the plight of the kidnapped Nigerian girls by posting her own #Bringourgirlsback photo.

Of course, she did hers TOPLESS! Sooo ... mission accomplished?

Rihanna loves to be nekkid ... A LOT ... but Instagram says her displays of public nudity go way too far -- and is now threatening the singer within an inch of her exposed nipples.

Rihanna posted topless snaps Tuesday from her photo shoot with Lui, a French skin mag -- and within an hour IG yanked 'em down ... because they violated rules against nudity.

Our Instagram sources tell us Rihanna got an email that basically warned her ... keep your clothes on or risk having your account permanently shut down.

But like a bikini trying to contain her boobs -- IG couldn't stop RiRi ... and she just posted the banned nudes on Twitter instead.

Thank you, Twitter.

Jennifer Blanc Biehn -- wife of Terminator star, Michael Biehn -- is giving herself a special 40th birthday present -- a full nude pictorial in Penthouse Germany.

Biehn, who was in "Dark Angel" back in the day, was 39 when she shot the spread ... but will be 40 when the May issue is released.

Jennifer tells us she wants to show women you can be proud of your body at any age.

Translation: she wants to prove she's still got it.

As for any special grooming before the shoot -- Jennifer says she keeps a clean palette at all times. However she did need a friend to keep her "nipples hard with a cold Red Bull can."

Das ist was freunde sind.

Cameron Diaz has an amazing and evil power -- the ability to make Kate Upton's massive boobs disappear.

As Cameron and Kate walked through the Sydney airport Friday -- not only was Kate NOT wearing a low-cut top ... she also pulled her jacket in a futile attempt to conceal her chest.

HUGE difference from Thursday when Kate was solo ... with her girls on full display.

This has been going on for weeks now -- every time Kate goes out with Cameron and Leslie Mann to promote their movie ... the rack gets put away.

Seems to us the spotlight is big enough for all the girls ... including Kate's.

On behalf of humanity, we say -- Cameron must be stopped!

This is fantastic: Kate Upton -- one of the hottest women in the world -- has bravely taken it upon herself to dispel crazy reports she's insecure about her body ... insisting she loves every inch of her flawless physique.

The Sun newspaper ran a story over the weekend purporting to quote Kate, who allegedly said, "I wish I had smaller boobs every day of my life." But Kate now insists she never said that.

She just tweeted, "Unfortunately, what was said about my body is completely made up to try and drum up controversy where there is none. Like every woman, I have moments of insecurity, but I love and am proud of my body -- every part of it -- and wouldn't change a thing."

That's right. Kate Upton wouldn't change a thing about her body. Imagine that.

Heidi Klum's new boyfriend, 27-year-old Vito Schnabel, went topless yesterday as he palled around in the ocean with Heidi in Tulum, Mexico.

Oh, did we mention SHE WAS TOPLESS TOO?!?!?!?

Schnabel is an art dealer in New York City. He's been previously linked to Demi Moore, Elle Macpherson and Liv Tyler. His father is Julian Schnabel ... director of films like "The Diving Bell and the Butterfly," "Before Night Falls," and "Basquiat."

She adds, "Every single day, I'm like, 'Oh, man, it would be so much easier,' especially if people didn't constantly bring them up." This coming from the girl who constantly flaunts her boobs in magazines like Sports Illustrated, Vogue and Vanity Fair and made a fortune off her floaters.

Kate says she wishes her jugs were more like clip-ons ... so she could take them on and off as she pleases.

Ladies, the angry mob line starts to your left.

67-year-old Cher is still super proud of her boobs ... and proved it by sportin' a pair of nipple pasties this week at a concert in Boston.

Cher -- who also rocked a pink wig, pink lip gloss at her Dressed to Kill tour -- seemed extra perky that night ... and also broke out her old low-plunging black onsie from her "If I Could Turn Back Time" video.

As for the nipple pasties ... one question -- doesn't it hurt to take those things off??

Katy Perry's got an unlikely new BF -- rapper Riff Raff -- at least that's on Riff Raff's wish list ... because he's SMITTEN after the two went on a date last week ... despite his obvious addiction to other women in thong bikinis.

Raff was out in Miami Tuesday when we asked about his date with the "Dark Horse" singer -- Raff says he took Katy out for the Holy Trinity ... sushi, bowling, and drinks ... and he had a blast.

If Katy's down -- Raff says he'd love to see her again ... maybe next week when she's back in the country.

We're a little surprised though -- Katy's a busty woman ... and from this clip, it's pretty clear Raff's an ass man. You gotta see it.

Nobody photoshops fake nude photos of Kate Upton and gets away with it ... a lesson Sports Illustrated wants to teach a joke website called Celeb Jihad.

The phony photo pheatures a photoshopped pic from an SI shoot with the headline, "Kate Upton Naked Outtake From SI Swimsuit 2014."

It's clearly a fake ... but Sports Illustrated's legal team doesn't care -- they fired off a letter to the site threatening to sue if the post isn't taken down, STAT.

In the letter, the lawyer complains, "One of these photographs has even been airbrushed."

Wouldn't be her first time.

Conrad Murray came back to Trinidad, celebrating Carnival -- and he gave his son an official introduction into the world of BOOBIES!

Murray returned to the place where he became the man he is .... glowing in the sunlight of freedom ... and also glowing from the reflection on his head.

The man who did hard time for Michael Jackson's death brought his family along for the topless extravaganza .... and his son is clearly fully indoctrinated.

That V isn't just for victory.

Danica Patrick's nipple is officially off the Internet ... TMZ Sports has learned the people at Sports Illustrated have finally removed a pic of the driver's exposed breast from its swimsuit website.

As we previously reported, several pics from a 2008 photo shoot were recently put on S.I.'s Swim Daily website as part of a "Throwback Thursday" gallery. One of the pics was a topless "selfie" in which Danica's nipple was fully visible.

There were questions as to whether the pic was posted by accident or if it was an intentional "artsy" thing -- but now that it's been removed from the gallery, it seems pretty clear ... it was never supposed to be there in the first place.

So ... Danica Patrick's exposed nipple is hanging out on a Sports Illustrated website.

The racy pic of the NASCAR driver is featured in a "Throwback Thursday" photo gallery on S.I.'s "Swim Daily" website ... which features a "selfie" style photo shoot of Danica from 2008.

We called S.I. to find out if it was a mistake ... or one of those intentional "nipples are artsy" sort of things ... but so far, we haven't heard back.