Celebrity Butts

Kyle Jenner took a pic that's right off the warning label of a car mirror.

The 19-year-old took the pic Saturday ... and check out the pic closely ... she's literally busting out of her pants.

We could've talked to Jason Derulo about anything -- hell, he openly admitted he was high as a kite -- so we tackled a very important topic in America today ... ass.

Gotta love Derulo in this clip, not just for his smoked out confession at LAX, but for his take on the big change in the peach emoji. Some ass critics believe the new shape's lost that ass-ish feeling. Jason has a more positive outlook.

JD wasn't kidding about being high either. What year is?

Celebs were out in force in Hollywood Saturday night, and they didn't fool us.

Abigail Ratchford certainly was hiding in plain sight. Kylie Jenner was true to form, dressing as Christina Aguilera in the "Dirrty" vid, which is hot.

As for Tyga ... well, he dressed as a successful rapper, Juelz Santana.

Check out Matt Bellamy, Elle Evans, Tera Reid, Kate Hudson, Taylor Lautner, Kourtney Kardashian, Paris Hilton, Joanna Krupa, Nick Jonas, Sofia Richie and more.

Lady Gaga does not mind a hand or 2 -- or 10 -- on her ass when she's performing ... 'cause she let her fans do just that Thursday night.

Gaga was performing at The Satellite in L.A. Thursday wearing booty shorts, when she fell butt first into a full-on crowd surf. In their defense, concertgoers were just holding her up ... but her cheeks were fully up for grabs in the process.

Lady Gaga's giving construction workers something to whistle at -- or in this case ... something to drool over.

Gaga was out in NYC Monday, strolling down the street and going about her business in some rather high-rising Daisy Dukes.

Snapchat queen YesJulz showed off the 3 B's Saturday in Miami ... bathing suit, butt and boobs.

Not much else to say.

Kim Kardashian got an up-close encounter from the same guy who attacked Gigi Hadid last week ... but this time he was kissing ass instead of grabbing it.

Vitalii Sediuk ran up on Kim's rear Wednesday in Paris ... slipping past security and planting a kiss right on her left cheek. Her security pounced and took him down immediately. It's unclear if he was arrested.

Kim was impressed with her team's reaction. As she put it ... "My security's a G."

Vitalii pulled the same crap 2 years ago in Paris -- also at Fashion Week -- but that attack was way more aggressive.

Mom, boob, a butt tuba -- all things you might relate to Kim Kardashian, and much like her ... they all look the same from front to back.

Ok, enough fun with grammar ... what's important here is Kim's front and back were on display in lingerie Thursday in Miami -- and yes, the paps got great shots as she came and went.

There's really no wrong way to look at these pics.

Actress Lyssa Roberts -- the Wimbledon streaker from "7 Days in Hell" -- has at least part of a backside grab mastered.

Not hard to figure out which part, once you take a look at her coasting along the Playa del Rey beach boardwalk.

Lady Gaga's full of crop tops in London, which means she's letting almost everything hang out.

Gaga left Capital London early Friday morning with a giant denim wedgie -- and cup of coffee.

She's got a new song out, and if this is how she's gonna promote, we say ... keep plugging away, Gaga!

Blac Chyna and her big ass jumped into bed with an ass-enhancing product ... a lot of people think is just a fake ass scam.

Chyna posted an ad promoting Booty Pop, a spray that claims to be an "All Natural Booty Enhancer." The endorsement was fleeting ... she deleted the post almost immediately -- perhaps because the company is bombing with the Better Business Bureau.

Apex Vitality, which makes Booty Pop, gets a C from the BBB -- and a ton of reviewers don't even give it that much credit. We checked and some call it a straight-up rip-off. One person said she was grossly overcharged and wanted someone to "shut them down immediately because this is one big scam."

We made multiple calls to Apex Vitality, but got no response. Ditto for Chyna's camp.

Gisele might have the greatest gig as a supermodel, but the guy in charge of prepping her ass for the camera has gotta be a close second.

Gisele squeezed in a very wet photo shoot in Rio on the heels of the Olympics. She's officially retired from runway modeling, but thank God she's still posing for pics like these.

We're guessing the butt wrangler does NOT get hazard pay -- shouldn't be paid at all, really.

Nya Lee's got some holes in her swimsuit game -- but photogs didn't mind it a bit when she hit the beach in Miami.

The former "Love & Hip Hop: New York" star made headlines earlier this year when she converted to Islam. During her photo shoot on Wednesday, Nya was sporting a black one-piece ... clearly designed by someone who believes less is more.

Break's over for Kim Kardashian after her celebrated butt somehow managed to fly under the radar for 3 whole days -- and now she's making sure everyone gets an up-close look!

Kim says she laid off Snapchat at the start of her Mexican vacation with girlfriends, and her kids, but all bets are off ... now that the paps spotted her at Joe Francis' oceanfront mansion in Punta Mita.

Check out the vid ... #FullMoonFever.

Kim Kardashian slipped into a tiny bikini and hit the beach in Mexico ready to roll around in the sand ... with her kids.

Yeah, North and Saint are on vacay with mom. The whole fam went out Thursday for some fun in the sun -- and the kids are so freakin' adorable they almost upstaged Kim's famed assets.

Almost.

Kevin Hart and Eniko Parrish's Caribbean honeymoon is a bootyful thing to behold.

The newlyweds hit the beach in St. Barts after tying the knot this past weekend.

He's puffin' on a cigar, but let's be clear -- Eniko's ass is what's really smoking here. Kev gets the picture.

As if they need anything more -- the Harts also have kick-ass accommodations. They're staying at the world famous Eden Rock hotel, in their Villa Rockstar ... typically, nearly $23k per night this time of year.

#BallersOnly