Celebrity Butts

The perks of being the #1 tennis player in the world ...

With just days until he's scheduled to hold court at the BNP Paribas Open in California, Rafael Nadal was chillin' in Mexico with his hot girlfrend Maria Xisca Perello.

The two were seen kayaking together on Tuesday -- the tournament begins on Thursday ... though Rafa has a first round bye since he's a #1 seed.

The ass that shook up the Legends Football League is now crossing over in a big way -- TMZ Sports has learned Ogom Chijindu has just been featured in a brand new booty video for World Star Hip Hop ... and let's just say Ogom ain't exactly shy.

Ogom -- who famously twerked all over an opponents face after making a tackle last season -- tells us WSHH reached out after they saw the ass-in-the-grill clip online.

"We met and talked about expanding my brand," Ogom says ... "I'm looking to be the first sponsored woman football player."

Ogom says she hopes to land a gig on a reality show -- but don't worry LFL fans, Ogom says she still plans on playing in the league this year, next year ... and "until my body continues to let me."

Can you guess which star strapped on this incredible string bikini and flossed her perfect posterior on the luckiest beach in Miami, Florida earlier this week?

Michael Strahan's fiancee proved he's a lucky man Wednesday night at a karaoke bar in Malibu -- by showing off her serious ass-shaking skills and putting young hotties to shame.

Nicole Murphy popped her booty to "Pony" by Ginuwine at Cafe Habana with co-stars Shamika Lawrence and Mayte Garcia ... and the other "Hollywood Exes" were clearly not in her league.

The trio attempted to sing "Hold On" by En Vogue as well (video below) ... but there's a lot less butt shaking.

Our apologies.

Rihanna and Drake got it on last night in Paris ... in front of 17,000 people ... grinding on stage to their duet "Take Care" -- and it's all on video.

As we reported, Drake and Rihanna have been inseparable in Paris since Drake flew into town this weekend for his tour, getting dinner, hanging out at nightclubs ... even crashing together at the same hotel.

And the chemistry on stage last night is undeniable -- take a close look at Rihanna's face.

There's no way she's acting either ... because she sucks at that.

Jen Selter -- fitness model turned ass Internet sensation -- tells TMZ Sports ... she LOVES when famous athletes and celebs reach out to her about her butt 'cause "it makes me feel special in a way."

Selter and her bulbous derriere were hittin' the streets of NYC when we talked about how her 'donk has exploded on Instagram ... with more than 2.5 million followers ... many of whom are bigtime stars.

"It's cool when talent reaches out to me ... 'cause it's like, I feel special in a way."

Also included in this clip:

-- How many squats Jen does per day
-- Who's got the best butt in Hollywood

The end.

Justin Bieber is about to make a judge's daughter the envy of her schoolmates, because he's about to see Justin's junk.

According to new court docs, Bieber's wiener and/or backside -- as they appear on jail surveillance footage following his DUI arrest -- will be carefully examined in private by prosecutors AND a judge ... before any more Bieber jail videos are released to the public.

TMZ broke the story ... Bieber's attorney asked the court to

Bieber's camp claimed additional jail footage features the singer's "intimate personal parts" -- which we've learned Bieber accidentally revealed while urinating in his holding cell -- and they want to keep the videos under lock and key.

Now, prosecutors have responded, agreeing to hold off on the release of any more embarrassing footage -- pending review by a judge.

Jennifer Lopez's ass went all "Fatal Attraction" in a tiny pair of tropical shorts ... shouting to the world: "I'm not gonna be ignored."

The 44-year-old mother of two flaunted her endless legs and famous cheeks while filming a music video with Pitbull and Brazilian singer Claudia Leitte in Ft. Lauderdale for the song "We Are One."

Or, in this case ... two.

The chiseled asses are out in force in Sochi ... both men and women ... showing off their incredible physiques.

But the million dollar question ... with Spandex running rampant, can you tell the difference between a taught male tush and a hard female heiny?

No wonder Eddie Murphy played the donkey in "Shrek" ... his daughters got ASS.

19-year-old Shayne and 24-year-old Bria -- Eddie's children with ex-wife Nicole Murphy -- recently posed for some lingerie modeling shots and wow ... just wow. They grew up fast.

It's a really tough call ... but we still gotta ask ...

Tom Brady recently announced he would not be watching the Super Bowl ... now, it's pretty obvious why.

The New England Patriots QB ran away to the Bahamas this week with his supermodel wife to take his mind off the fact his team won't be competing for the Lombardi Trophy on Sunday.

The 36-year-old future Hall of Famer recently told a media outlet ... "Truthfully, I could care less about watching the game. That's pretty much how I feel."

Yeah, we get it.

The Seattle Seahawks have one HUGE advantage over the Broncos in the Super Bowl ... their cheerleaders' asses are wayyy bigger -- this according to bona fide booty-expert Sir Mix-A-Lot.

The "Baby Got Back" singer tells TMZ Sports ... there is no competition between the teams when it comes to butt-size, saying simply "Seattle cheerleaders got the best asses."

Mix -- who's from Seattle -- is a diehard Seahawks fan ... but his views on the cheerleaders aren't totally biased ... 'cause the rapper admits the "Denver cheerleaders have the best t**ties."

TWO MILLION butt aficionados can't be wrong ... which is why fitness model person Jen Selter has become the Internet's reigning QUEEN OF ASS!

And she'll have no trouble holding the title -- if she avoids dairy and spicy foods.

42-year-old mother of four and cancer survivor Brooke Burke-Charvet knows how to live life to the fullest ... and tightest ... flaunting her ridiculously toned body at a gas station in Malibu today.

Just to recap: this "Dancing with the Stars" badass is 42, she has 4 kids (3 daughters and 1 son) and recently beat thyroid cancer following a scary diagnosis in 2012. And she can still look this good.

FYI, Brooke is currently married to former "Baywatch" star David Charvet.

Gotta love California.

Olga Kent is an Italian actress/model ... she also might have the flattest ass we've ever seen.

Kent was frolicking around Miami Beach in a tiny red bikini yesterday ... and flashed a backside that seems to be the yin to Kim Kardashian's yang.

This is Nicole Minetti ... one of the women convicted of wrangling up prostitutes for disgraced Italian Prime Minister Silvio Berlusconi ... and by the looks of these pics, you'd never guess she'd recently been sentenced to 5 YEARS IN PRISON.

According to Italian officials, Minetti was one of the key people who supplied the hookers to Berlusconi's legendary "Bunga Bunga" parties. She's been sentenced to 5 years in the big house ... but that's on hold 'cause she's appealing the case.

In the meantime, Minetti's passing the time by romping around the beaches of Miami in a thong ... just like she did on Christmas day. Which begs the question ... how the hell did she get in the country after she's been convicted???