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Conor McGregor is going balls out to promote the Pegasus World Cup horse race ... well, ALMOST balls out.

The UFC superstar stripped down to his nude-colored skivvies for a new spot to promote the January 28th race for a comedic bit with Jon Lovitz.

Just glad Conor didn't hurt himself ... he's got a big boxing match to prep for.

Just days after that rough loss to the ATL Falcons, Russell Wilson popped up in Beverly Hills ... where he got to spend some quality time with his wife and fetus!

The couple was spotted out on a breakfast run early Tuesday morning -- Ciara in a tight dress to show off her bump.

She's in her 3rd trimester. The kid is due around the end of March.

Cuteness all around ... just one piece of advice -- CARRY THE BAG, BRO!

Coco's baby daughter doesn't need any stinking floaties when she hits the beach ... not when she's got mommy!

Coco took 1-year-old Chanel out for a day in the sun Tuesday. We're not sure if the little girl was thinking safety, or just lunch.

It's Kim Kardashian like you haven't seen her ... since October.

Kim and sister Kendall dressed up like they were going to one of Kanye West's fashion shows Monday night, only it was for a cameo in the upcoming "Ocean's Eight," which is currently shooting in NYC.

It was booze, butts and boats for Kristin Cavallari and Jay Cutler on their Mexican vacation ... with the two stars partying their asses off on a yacht with a gang of friends.

The Cutlers were in Mexico to celebrate Kristin's 30th birthday ... but the highlight was a booze cruise on a boat called the "Blue Guru" with celeb hairstylist Scotty Cunha.

Guessing Cutler paid for the excursion since he reportedly made $16 mil this year.

Suki Waterhouse knows age ain't nothing but a number when you're with a hotshot like Diego Luna on his home turf.

Paps got the British model hanging out with the 'Rogue One' star in Tulum, Mexico over the weekend, and they looked pretty comfortable with each other ... especially Diego's right hand.

He's more than 10 years her senior -- Suki's just 25. But hey ... may the force be with 'em.

We didn't think she could pull it off ... but Margot Robbie is shaping up to look A LOT like Tonya Harding.

Paps got Margot on the set of the new film, "I, Tonya," and unlike the video we got last week when she hit the ice ... Margot bears a striking resemblance to Tonya.

Amazing what some hair styling and poundage can do ... plus those '90s jeans work wonders.

Kim Kardashian is pretty clearly back to her old self ... and her ass is finally back in the picture.

Paps got Kim in Dubai -- where's she's been doing all makeup for the week -- and they finally got a shot of her good ol' curves ... booty and all.

Good to see you again, Kim.

Bella Hadid just presented a united front against Selena Gomez ... with the help of mom and sis.

Bella was out Saturday night at Nobu in NYC with her older sister, Gigi Hadid, and their mom, Yolanda, ... and you're naive to think this has nothing to do with squadder Gomez dating The Weeknd.

It's like they say -- there's power in numbers ... and in Hadids (technically one is Foster, but you get the point).

Adele's bank account screams caviar and champagne, but she keeps proving she's strictly a peanut butter and jelly kinda chick.

Despite selling more than a 100 million records, at only 28, she loaded up on groceries Thursday at a Ralphs. She could easily cruise the aisles of a highfalutin Whole Foods or Bristol Farms -- and have someone do it for her -- but Adele keeps it real.

Taylor Swift has a major rift in her girl squad -- and the only way to patch it up is to work things out ... or just work out.

Paps got Taylor leaving fitness studio Body By Simone in WeHo Wednesday, looking pensive amid the Selena Gomez and Bella Hadid drama that's brewing.

If you need a refresher ... Selena was seen making out with Bella's recent ex, The Weeknd, and then got unfollowed by Bella on Instagram ... yikes.

The Weeknd is bouncing back from Bella Hadid just fine by making out with Selena Gomez.

Selena was seen hanging all over The Weeknd Tuesday night outside Giorgio Baldi in Santa Monica -- getting handsy and mouthy with the singer. We don't know how long this has been going on, but they're definitely a thing ... based on these pics.

There's potential drama here -- Selena's pals with Gigi Hadid ... so her sister, Bella, might have a thing or 2 to say about the hookup.

Paris Hilton picked up something new in Mexico ... and he's a total stud.

Paris is hanging in Tulum this week with a mystery man. Here's what we know about him so far -- he likes walks on the beach in his jeans ... and rolling around with Paris. Not necessarily in that order.

Looks like P is putting the breakup with whatshisname behind her. What's that saying about the best way to get over one guy?

Paris is a believer.

Hours after the Kim Kardashian robbery suspects were busted ... she and Kanye West had a celebratory dinner, and Kim's looking more and more like she did pre-robbery.

Kimye hit up a Shu Sushi near Bel-Air Monday night. Looks like they're slowly coming out of hiding ... on the heels of his breakdown and her Paris ordeal.

Kim's still wearing very little makeup and still kinda dressing down -- if down means rocking lace tights with destroyed denim.

Paris cops working the Kim Kardashian robbery are taking suspects and a ton of evidence into custody ... and now there's a report one of her drivers was allegedly involved.

We got these pics of investigators handcuffing several more of the so-called Kim K 17 -- the suspects allegedly tied to the October heist. You can also see cops confiscating several items, like big screen TVs, from their homes.

According to French newspaper Le Monde, one of the 17 is a driver for a limo company frequently used by the Kardashians when they're in Paris. The report raises an old theory about Kim's robbery -- that it was an inside job.

Ashton Kutcher and Mila Kunis now have 2 kiddos hanging off their arms ... and they couldn't look any happier for it.

Paps got the couple grabbing breakfast Sunday morning in L.A. with their kids in tow -- 2-year-old Wyatt held hands with mom ... and newborn Dimitri got cradled by his pops.

Kids ... what a joy.