Hook Ups

Mariah Carey's billionaire boyfriend went full throttle on his yacht -- getting a face full of her cleavage, and proving the old adage ... it's really good to own a yacht.

James Packer was putting on a motorboating clinic while MC chilled on his vessel. As we've been reporting, they've been cruising around Italy all week, and there's already talk of marriage.

If this up close look at the family jewels doesn't close the deal ... nothing will.

Chris Martin was arm-in-arm with Kylie Minogue -- at 1:30 AM in a London park -- which may or may not be news to his GF of several months.

Chris and Kylie were strolling together early Monday morning after her concert in Hyde Park -- and the late/early hour of has some people thinking he and Jennifer Lawrence are dunzo.

J-Mart seemed pretty tight earlier this month snuggled up in the back of Bono’s SUV, and it's entirely possible Chris and Kylie were just a couple of non-banging pals getting fresh air.

Mariah Carey doesn't waste time ... just days after she hopped on a yacht with new billionaire BF James Packer, they're already talking marriage.

Our Mariah sources say it's insane ... they've been "dating" for just a matter of days, but he's already told her he wants to marry her, sooner rather than later. The soonest can be when she's officially divorced from Nick Cannon. But we're told Mariah is open to tying the knot with James.

We got this photo of Mariah and James on the boat, wearing matching robes ... almost like they're on a honeymoon.

They've been cruising from country to country since late last week, and James blared Mariah's music for everyone to hear, including all the people on vastly smaller boats.

We broke the story ... James is obsessed with Mariah and her music. He went to her concert in Vegas a month-and-a-half ago and has been pursuing her ever since.

Mariah Carey's new boyfriend is so smitten ... he's treating everyone on his yacht to a piece of her.

Australian billionaire James Packer threw a party for Mariah Sunday off the coast of Sardinia. We're told a bunch of "bougies" were on the boat and the entertainment was all Mariah, all the time. Packer is obsessed with her music and played it the entire evening.

TMZ broke the story ... Packer has been pursuing Mariah for months. Here's what's weird. We're told he went to one of her Vegas shows a month and a half ago and hadn't seen her again until she jumped on his yacht last week. Yet we're told things got "immediately serious."

In other words, Packer is in hook, line and sinker. As for Mariah, we're told she's game for something serious.

The hot guy Britney Spears posed with on a boat is NOT her new BF, but she did go out of the way to make sure everyone saw them getting cozy ... one day before news broke she was single again.

According to our sources, Britney was at a lake in Louisiana on Sunday with some friends and family when the guy -- a local boat handler named Harris -- asked Brit for a pic.

She obliged, but we're told for some reason Brit asked to take the photo with HER camera, and Harris was shocked when SHE posted it with the caption, "So nice to be home! Nothing like Louisiana boys."

We're told there's nothing more to it than that -- just a down home girl appreciating the down home scenery.

As we reported, Britney's single again after an amicable split from Charlie Ebersol.

She could do worse than good ole Harris, btw.

Rihanna partied with her new boyfriend and the old one who beat her.

It seemed like just another night at Henry's in West Hollywood Saturday at 12:52 AM when Rihanna showed up. Then -- 3 minutes later -- Chris Brown shows up and walks inside. There's no sign of Rihanna's new BF, soccer star Karim Benzema.

Fast forward to 2:01 AM. Chris leaves the club. Exactly 1 minute later, Rihanna makes her exit. And then, at 2:04 AM, Karim surfaces and leaves the club.

The likelihood that Gigi Hadid and Joe Jonas are banging just went from clear and convincing evidence to beyond a reasonable doubt ... and we say that with 2 new pieces of evidence.

EXHIBIT A: Joe planted a kiss on Gigi as she got out of his car and headed for a terminal Friday at LAX.

EXHIBIT B: No one drives someone to the airport unless they're having sex.

Nick Cannon locked hands with a mystery woman at the most magical place on earth … but Nick says it’s not what you think.

On the surface it looks like Nick's got a new babe, but we're told she's just a friend ... a fashion designer he hangs out with from time to time.

On the other hand, as we first reported, Mariah is now head over heels with James Packer, an Australian billionaire. They're hanging in Capri and cruisin' on his yacht.

Who says it's not a contest?

File this one under, "Duhhhh" ... but Travis Barker says dating smoking hot UFC ring girl Arianny Celeste is "awesome."

Yep.

We broke the story ... the two have been dating for several months and are still going strong. So, when we saw the rock star in Calabasas yesterday, we had to get the update.

The good news ... dating a ridiculously attractive hard-bodied model is everything it's cracked up to be.

Mariah Carey has got a new boyfriend, TMZ has learned, a billionaire who's the 4th wealthiest person down under.

The guy is James Packer, a 47-year-old entertainment mogul who sold a media company and now owns a string of hotels and casinos around Australia and other countries. He's worth an estimated $4.6 billion, according to Forbes.

We got this pic of Mariah and James taken Friday in Capri, Italy. They're staying on Packer's yacht and we're told they'll be on the boat for "an extended vacation." After Capri, it's on to Cannes and St. Tropez.

As for how they met ... Brett Ratner.

Sources close to Mariah tell us James has been aggressively pursuing Mariah for months, and he succeeded.

Can't a guy just rap about some rough sex without everyone trying convict him of statutory rape?

That's the first amendment case being made by Boosie Badazz on behalf of his good friend Tyga, who's caught a ton of flak for rapping about sex and "catching a felony"... which many thought was a reference to 17-year-old Kylie Jenner.

Boosie -- who is featured on the track "Pleazer" -- stands behind Tyga's claim the song was recorded before he ever hooked up with KJ. In fact, Boosie even posted a pic with Tyga in the studio that day (try to ignore the fact Chris Brown was there too).

Boosie says the "felony" line was part of a metaphor referring to rough sex, but definitely not with Kylie -- and adds it's unfair to use Tyga's old lyrics against him ... an issue with which Boosie is all too familiar.

Boosie was indicted on first degree murder charges back in 2010 and prosecutors tried to use lyrics of his (about killing people, mind you) as part of the case against him.

Margot Robbie is out of the game ... on the bench ... off the market ... NOT ever going to be yours -- 'cause the Aussie hottie and her man are flashing gold bands that reek of marriage ... we think.

Margot was walking around Toronto -- where she's shooting "Suicide Squad" -- with the gold piece. Thing is ... her beau, aspiring director Tom Ackerley, was sporting similar jewelry last week. Both of them have it on THAT finger.

Robbie and Ackerley hit the one year mark this month... so, it could be perfect timing for him to pop the question.

There's still hope fellas -- they could just be promise rings. Plus, what newlywed or newly engaged chick (especially a smoking hot one in Hollywood) doesn't flash her diamond??

Then again, reality is ... you never had a chance.

8:47 AM PT -- Sources connected to Karrueche tell us ... Memphis recognized Karrueche while hanging out at a club and asked for a photo.

We're told the whole exchange was friendly ... but they're definitely NOT dating.

She already kicked Chris Brown to the curb ... now, Karrueche Tran is kickin' it with an International soccer star ... and this guy is RICH!

Tran was hanging out in Miami with Memphis Depay -- a Dutch soccer superstar who plays for Manchester United.

In fact, the 21-year-old phenom just signed a reported $40 MILLION contract with Man U back in May -- so, dude's got money.

So far, no word if Karrueche and Memphis are friends ... more than friends ... or nothing at all.

But if there is something there ... upgrade?

'Walking Dead's Daryl Dixon is not dating his fellow survivor pal Beth Greene in real life ... so he says.

Norman Reedus' rep tells TMZ, the actor's relationship with former co-star Emily Kinney is strictly platonic.

We got these pics of Norman and Emily at Paper Plane, a dive bar in Decatur, GA. It looks real chummy, but the two have been good pals for a while and that's it.

She had a concert in the area earlier in the evening and they hung out afterward.

Emily played Beth on the zombie thriller but was killed off last year. Their characters were in the same survival group and he was protective like a bro.

Too bad ... we were rooting for more.

Cynthia Bailey doesn't think video of her husband kissing another woman is evidence of cheating ... seriously.

Hubby Peter Thomas had some 'splainin' to do after video surfaced of him smooching a chick in a Charlotte, N.C. bar. Peter has the standard response ... she's just a friend.

It looks romantic to us ... and everyone else, except Cynthia, who tells us it's just an innocent peck on the cheek. Check out the video and decide for yourself if it's the cheek or the smacker.

Cynthia was vague, acknowledging the video is embarrassing to her but she'll deal with Peter privately. It's unclear if that means a new ring or an ass whooping.

But she insists she's standing by her man. Hey, Hillary did, and now she's running for President.

Ruby Rose, the smoking new star of "Orange is the New Black" ... is breaking the hearts of all the men and women drooling over her -- by flaunting her fiancee around town.

Rose and Phoebe Dahl -- who got engaged a few months ago -- arrived back in L.A. on Wednesday after hanging in NYC for the 'OITNB' Season 3 premiere.

Aussie native Rose is getting a ton of attention for her striking looks -- and sure enough, fans hit her up for pics when she and Phoebe went shopping.

A striped shirt and a ball cap would be "dressing down" for most people ... but most people don't look like Ruby.

Phoebe wins.