Celebrity Butts

The guy who attacked Kim Kardashian in Paris last week has struck again -- this time Ciara was his victim -- and Paris cops still think it's a stupid, nothing offense and they aren't taking action.

Vitalii Sediuk was standing outside the Valentino fashion show wearing a trench coat, and as Ciara passed him he lost the coat and hugged her hard, wearing a thong.

Sediuk had something written on his leg referencing a USA ban ... he's been barred from red carpets in the States following his attack on Brad Pitt.

We reached out to Paris cops to see if they'd now take action against Sediuk, but they said they have no plans ... they say it's not important enough to warrant their attention.

Laissez-faire!

Kanye West is protecting his gluteus to the maximus.

Kim and Kanye are in Paris for Fashion Week and Mrs. West posted a picture on Instagram of Yeezus showing his affection for her backside.

As we previously reported ... Kim upped her security detail this week after she was almost tackled to the ground by a crazy person during an event in Paris.

Good thing Kanye's got her ass covered.

Jennifer Lopez performed at the Singapore Grand Prix and laid down the perfect sequel to her "Booty" music video.

There was so much ass shaking and grinding ... the performance should go down in the annals of history! Or at least of this week.

With her backside back in the headlines, 45-year-old Jennifer Lopez put her most prized asset front and center while performing Sunday night at the Singapore Grand Prix.

Jennifer Lopez looks so good in lube in her new "Booty" music video with Iggy Azalea -- she now stands to make a bundle off a company that makes the stuff.

Reps for Doc Johnson Lube fired off the sticky to proposal to J.Lo after seeing the video last week -- and we're told they were especially inspired by the shots of her covered in a liquid they believe to be personal lubricant.

Bottom line -- Doc Johnson wants to be in the J.Lo butt business ... and the company is offering her a year's worth of its lubrication gel for free to prove it. The good doc also wants to discuss a long term sponsorship deal, if Jennifer's interested.

Something tells us this is NOT right up her alley -- but can't knock 'em for trying.

Jennifer Lopez looks amazing grinding her ass on Iggy Azalea’s in their new music video “Booty” ... but is it just a desperate cry for attention?

Scratch that -- it IS a cry for attention ... and it's working.

Iggy Azalea is one big-ass contradiction ... she's running from a sex tape her former BF made, but she just dropped one of the hottest, most sexual videos EVER with Jennifer Lopez.

Just watch and behold the video -- "Booty." Whatever your sexual orientation, you will be turned on. Seriously.

Iggy and JLo grind crotches and slap each other's asses ... with commitment.

It's also very wet ... after they oil up. BTW ... there's also music, but seriously, who cares?

Los Angeles Lakers star Nick Young is a huge friend of his GF's ass ... and so is Jennifer Lopez ... 'cause J.Lo and Iggy Azalea are twerking ALL OVER EACH OTHER in a new video that just hit the 'net.

Lopez just released her new video for "Booty ft. Iggy Azalea" ... and really it's just an excuse for the two badonkalicious women to show off their backsides.

There's booty shakin ... booty slappin' ... booty twerkin ... booty on booty action.

It's insane.

First the S.I. Swimsuit edition ... and now surf pro Anastasia Ashley has shredded her way into Maxim for a super hot bikini photo shoot in the middle of the desert.

Ashley -- who's pre-surf twerking routine went viral a few years ago -- shot the whole thing back in July in the middle of Littlerock, CA (population 1,400).

Here's our two-word interview with Ashley:

TMZ Sports: How was the weather?
Ashley: Literally MELTING!

Nicki Minaj knows the game ... you want people to stop talking about a bizarre photo of your booty -- you gotta give 'em a perfect pic of something else. Hmm, half-exposed yabbos oughta do it.

Anacondas like those too

Nicki Minaj attempted to erase the bizarre butt cheeks image Friday night in France ... by flashing a whole lotta underboob.

Minaj hit up Club 79 in Paris after a surprise appearance at Beyonce's concert ... and it was clear the singer was trying her best to distract the attention away from her ass ... for once.

In case you missed it ... N.M. performed at the "Fashion Rocks" event Tuesday in NYC and during the gig photogs snapped an awkward shot of her glutes.

UFC badass Lyoto Machida is about to get to the bottom of a mystery -- a bottom mystery -- 'cause the pro face breaker just told TMZ Sports why women in his native Brazil have such nice ... assets.

Machida was out in Beverly Hills with his smokin' hot wife when our camera guy asked the question that women all over the world want to know -- how do Brazilian chicks get their mystical booty powers???

Check the video -- Machida gives our camera guy two reasons Brazilian chicks are so bootylicious.

Nicki Minaj took a seat during her performance at Tuesday night's "Fashion Rocks" event in Brooklyn ... and if you know what's going on with her butt in this photo, you know more than we do.

Khloe Kardashian's been crushing it in the gym ... drawing ever closer to the ultimate goal -- because on the Kardashian family tree there can only be one ass to rule them all.

Everyone, including Khloe, knows Kim's been the standard bearer ... the most famous butt in the family

So, here it is -- Kim vs. Khloe, kakes vs. kakes. Khloe actually answered ... but do you agree?

The Miss Bumbum Brazil contestants have the most awesome way to celebrate reaching one million votes in the competition -- they've released a lingerie photoshoot to say thanks.

Online voting will determine 15 finalists from the 27 chicks vying for this year's title ... and the finalists will duke it out in Sao Paulo in November.

This year's contestants include a Megan Fox look-alike, a pair of twins, and a 39-year-old woman, who is apparently the oldest contestant they've ever had.

It's back-to-school season which means Summer is officially over -- but before you go and buy pumpkin flavored EVERYTHING... take a magical trip through the last few months and soak up all the sexiest pics to hit social media.