Sports Illustrated

Gigi Hadid's outfit at the S.I. Swimsuit Issue party left little to the imagination, except this -- we can't imagine where the hell her butt went!

Put out an A.P.B. because Gigi's much beloved ass was definitely missing at the NYC event. We're gonna chalk this up to really, really bad camera angles ... even though the profile shot isn't all that cheeky either.

Let's just remember better days -- Gigi's ass at last year's Tommy Hilfiger show ...

If Tiger Woods wasn't kickin' himself before ...

Here's Olympic skiiing legend Lindsey Vonn getting in a quick workout while on the set of her Sports Illustrated Swimsuit Edition body paint shoot ... and it's awesome.

Not only is she basically naked -- and beasting out with a set of full grown-ass woman pull-ups -- but she's also doing it while sporting a pair of high heels.

If you ever wanted to watch SI swimsuit model Nina Agdal jump around in a tight dress and high heels you're in luck ... because TMZ Sports has video of Nina playing ping pong!!

Agdal is in full promotion mode for the upcoming SI Swimsuit issue and during an appearance on "The Dan Patrick Show" she decided to play a little ping pong with one of Dan's staffers.

Bad news? She lost. Good news? She looked unbelievably good doing it ... and we all get to watch.

BTW ... we threw in a clip of Nina succeeding at hoops ... strictly so you respect her as an athlete.

Ronda Rousey slapped on a new coat of paint -- a very thin one -- for a new S.I. swimsuit photo shoot in the Bahamas.

The ex-champ's clearly getting used to being naked, essentially, in front of strangers -- and, truth be told, we're getting used to it too.

This is round 2 for Ronda in body paint. TMZ Sports got the first shots of her spread 3 weeks ago on Petite Martinique.

Ronda Rousey's swimsuit was painted on for her Sports Illustrated photo shoot, but that didn't stop sales of the actual one-piece it's based on from selling out almost instantly.

Ronda's paint job was a replica of a one-piece made by Australian swimwear brand, We Are Handsome. The company's a fave with celebs ... Beyonce even sported one of their jaguar suits over the summer.

We Are Handsome tells us Ronda's plug made website sales for the suit surge 300% ... so good luck getting it.

But in case you're feeling lucky, it's called The Fighter ... perfect fit for Ronda, even if she never really wore it.

Ronda Rousey wore a real body suit Friday as she was out and about in L.A.

Ronda gave BF Travis Browne a big smooch, looking like her old self.

She's gotta love the reaction she got from the pics we posted from the S.I. modeling shoot, where her swimsuit was literally painted on.

Ronda Rousey's confidence is back to champion form, and TMZ Sports has the hard evidence -- Ronda sporting NOTHING but body paint on a Caribbean beach!

The ex-UFC champ is doing a photo shoot for S.I.'s upcoming Swimsuit Issue on Petite Martinique island, off the coast of Grenada. We checked, and what looks like a swimsuit ... is just paint.

As you can imagine, Ronda's shoot on a public beach drew plenty of attention ... hence these pics.

Victoria's Secret Angels have no problem rolling around in mud ... and we have no problem watching them do it.

Hell must be freezing over ... 'cause an extremely hot woman that has been connected to Tiger Woods tells TMZ Sports the two are actually NOT banging ... and get this, Tiger never even tried.

We spoke to Turkish bikini model Tugba Ercan, who has been linked to Woods ever since she posted a picture of the two hanging out at a World Poker Tour event last week.

Ercan says several websites ran with the story assuming that Tiger ... who just broke up with GF Lindsey Vonn ... was back up to his old birddoggin' ways.

"They made it seem like it was something it wasn't, it was really just a picture."

Ercan -- who once again, is SUPER HOT -- says that not only are her and Tiger totally not a thing, but that the notorious womanizer didn't even try anything ... and was a perfect gentleman.

"He was very nice and polite. One of the nicest people I ever met, the charity work that he does with the World Poker Tour for children is amazing and moving to me."

Good news? The extra eyes on Tugba have really been a shot in the arm to her modeling career ... leading to her being named S.I.'s "Lovely Lady Of The Day."

"I really would love to be the first Turkish model in the Swimsuit Issue. It's my dream."

It's now our dream too ... check out the pics below.

Hannah Davis better watch her perfectly sculpted ass ... 'cause Jose Canseco's hot model daughter is gunning for her spot in the 2016 SI Swimsuit Edition.

Turns out, Josie Canseco is an aspiring model ... who's making a serious run to get into the most famous bikini mag in the country.

In fact, she shot a video for SI's Swim Daily to better her chances, here are the highlights ...

-- She thinks lingerie is sexy
-- She doesn't like dudes with crazy chest hair
-- And thinks most women want to date a version of their father

So, pay attention you smooth-chested, athletic roid-heads ... you may have a shot.

Ronda Rousey spent more time throwing punches on the set of her Sports Illustrated Swimsuit Edition modeling shoot ... than she did during UFC 184 ... and now there's video of the scantily clad workout.

SI just released the video ... in which Rousey says she was WAY more comfortable doing martial arts poses during the shoot than the traditional kissy-face looks.

Hey Rory ... you seein' this?

Check out these pics of tennis superstar Caroline Wozniacki -- featured in her very own spread in the Sports Illustrated Swimsuit Edition.

It seems Wozniacki's really let loose since golfer Rory McIlroy broke off their engagement last year -- she's been on several girls-only trips with her BFF Serena Williams ... and started posting all sorts of hot bikini selfies.

And now she's upped her game in the new SI pics ... even showing off her ass.

Caroline isn't the only athlete in the mag -- UFC badass Ronda Rousey also got a spread.

Stay tuned for those, but in the meantime ...

If there's one thing the Internet knows ... it's that Kate Upton in a bikini (and sometimes out of it) is an easy win -- and the folks at Sports Illustrated just rung up another W.

Kate's been getting a ton of attention for her "Game of War" commercials, which seemingly runs during every commercial break of sporting events.

So, S.I. just wanted to remind everyone they have the hottest Upton footage on the planet ... by posting a throwback video to a 2012 photoshoot.

Thank you, S.I.

Alex Morgan ain't the only chick on the U.S. National Soccer Team with a super hot body ... and Sydney Leroux is making sure Sports Illustrated knows it!!

Leroux -- who was part of the 2012 gold-medal winning Olympic team -- has been on a bikini photo posting tear ever since S.I. started to push the new Swimsuit Edition, featuring Morgan.

The pics ... they're good.

To be fair, Leroux's physique hasn't been totally ignored by the media ... she WAS featured in a semi-nude pic in ESPN's 2013 "Body Issue."

And get this ... there were rumors Sydney was dating 49ers QB Colin Kaepernick -- but neither side ever confirmed.

Too bad ... for him.

"Sports Illustrated" swimsuit model Chrissy Teigen isn't the selfish type -- telling TMZ, she doesn't care if her husband John Legend ogles at other hot women ... in fact, she loves it.

28-year-old Chrissy was out signing copies of the new "SI" swimsuit issue last night when we asked what she'd think if she caught John looking at the other ladies in the magazine.

Not only did Chrissy say she'd be into it ... she tells us, "We're pretty open to that kind of thing."