Summer

Mark Zuckerberg's summer of Man vs. Wild 2019 is in full swing up in Lake Tahoe -- where he's now a boating captain ... with a little assistance from the crew, of course.

The Facebook founder and CEO was at one of his two new Tahoe waterfront estates Saturday -- properties he reportedly dropped around $60 mil for this past winter -- and Zuck was getting briefed on a new operating system ... it's called HowToSteerVessels 2.0™.

Eyewitnesses tell us Mark and some pals were being taught how to steer this boat, and that he even got behind the wheel at one point as it drifted away from the dock.

It must've been a successful outing, 'cause we're told Mark and co. had the boat out on the water for a few hours before returning to shore. Now, it's unclear if MZ owns this thing -- it's possible he's just learning how to drive on it and someone was doing him a favor.

Ya gotta imagine when he gets it down, he'll shell out for something a bit nicer -- dude's worth an estimated $66 billion, after all. He can afford to be among Tahoe's finest, no doubt

It's interesting too ... Mark's been getting in the water A LOT over the past year or so, including what look like some cool ventures there in Tahoe this summer as well. He posted a photo last month of him paddle boarding on the lake and taking in a gorgeous sunset.

David and Victoria Beckham are flexing their British roots with some of the best company the UK has to offer -- Sir Elton John is onboard with the couple on the same yacht.

The Beckhams and their children are riding on a luxury yacht right now with the legendary singer, his husband David Furnish and their kids -- where they're all enjoying the steady waters in the South of France ... and diving in feet first when the mood strikes, it seems.

Well, Dave is anyway -- he was snapped holding hands with his daughter, Harper, and one of Elton's boys ... jumping off the side of the yacht into the ocean as a group.

Based on what we can see here, the wife had a little something for him when he came back up dripping wet. Yes, you can feel the love today with these two ... it's as strong as ever.

As for boat wear ... DB went with the classic shirtless look, Victoria rocked a sun dress and Elton was in a floral design getup ... rockin' his shades too, per usual. Looks like he kept Victoria company at one point while Dave was splashing around with the kiddos.

Bella Thorne went in the drink with her Italian pop star boyfriend Benjamin Mascolo.

Bella and Benjamin have been on a romantic vacay in Sardinia, Italy, and each spent a considerable amount of time trying to resuscitated the other. Gotta say ... Benjamin's got some pretty cool ink.

They've been together since April, just days after Bella's split with Mod Sun. They have made it clear to anyone on social media who cares to look ... they're a couple.

BM's half of the duo Benji & Fede.

Dennis Quaid is taking advantage of the last week before school is back in session ... bringing his smoking hot, grad student girlfriend on a romantic getaway in Lake Como!!!

As we all know ... age ain't nothin' but a number -- but you can tell 65-year-old Dennis is having a grand time with 26-year-old Laura Savoie. Easy to see why in these killer vacay pics.

Seems Dennis has a thing for millennials ... he split with 32-year-old model Santa Auzina earlier this year, and now his new GF is even younger!!!

Dennis and his sexy co-ed still have a lot in common despite the huge age gap. He's from Texas, she goes to the University of Texas, and they both love speedboats!!! Match made in heaven.

Laura doesn't have to go back to class until next week, so Dennis has plenty of time to end their summer with a bang.

Future, 21 Savage and fellow Atlanta rapper Big Bank Black gave back to their community in the funnest way possible ... AND helped everyone stay cool in the process.

The rappers rented out the entire water park at Six Flags White Water in the ATL Wednesday, and seemingly invited everyone from their Zone 6 neighborhood to get some relief from the summer heat at an epic "hood day."

We're told the 3 hip-hop stars dropped around $300k on this year's celebration for Zone 6, which included free food and drinks for everyone. Savage and Big Bank joined in on the good times on the lazy river too.

Other celebs who got wet and wild at the park included Tommie Lee from 'L&HH' and reality star Shekinah Anderson. There was also no shortage of chicken fights and surprise dunking ... 21 Savage even fell victim!!!

Heidi Klum and Tom Kaulitz can't keep their hands, or mouths, off each other on what's turned into a marathon of a honeymoon in Italy. Hey, don't let us interrupt!!!

The ex-supermodel and her new rock star hubby are STILL laying out on the high seas off Capri, where they've been enjoying the yacht life ... but, more importantly, each other ... as you can tell in these pics of them smoochin' and getting a little nakey on board.

Tom's kissing Heidi's thigh, she's kissing Tommy's abs ... and even some boring old school kisses on the lips. Like we said, lots of PDA.

BTW, Heidi has NOT been shy about losing the upper half of her outfits these past couple weeks -- besides going topless here, she also posted a kinda, sorta NSFW shot 2 days ago.

As the kids are saying these days ... #FREETHENIPPLE!!! More power to ya, Heidi.

As we reported ... Heidi and Tom got secretly hitched about 6 months ago. They had a big Italian yacht wedding a couple weeks ago with friends and fam, and have been there ever since. They're coming up on 3 weeks of honeymoonin', to which we say ... great work if you can get it!

Aziz Ansari is in much calmer waters now when it comes to the dating scene -- and he and his GF are partaking in one of the finest parts of European culture ... topless beaches!

The comedian was on the Spanish island of Formentera Sunday with his girlfriend, Serena Campbell ... they've reportedly been dating for at least a year now. Serena started out in a two-piece, but quickly ditched the upper half as they headed for the ocean.

Worth noting, Serena's from Denmark -- so this topless thing is nothing new for her.

One of the first times Aziz and Serena were spotted out in public was in 2018 when they showed up together at the U.S. Open tennis championship in NYC.

He's also made reference to her in his latest stand-up special, "Right Now," which is currently airing on Netflix. He joked that people still have something to say about him being in an interracial relationship -- whether it's blatant racism, or fake woke-ness.

One thing's for sure -- Aziz being tied down should certainly help with keeping him out of the headlines over his 2017 #MeToo moment, which many people feel was unwarranted, anyway.

Ryan Seacrest is on again with his longtime girlfriend, Shayna Taylor ... and nothing says we've made up like a romantic getaway on the Italian high seas.

The "American Idol" host was seen enjoying the hell out of a megayacht he and Shayna were aboard Saturday while vacationing in Positano, Italy. They'd split up earlier this year after about three years together -- now, it looks like they're two peas in a pod again.

Shayna was spraying sunscreen on her boyfriend's backside, and Ryan was trying to help her reach the tough places by bending whatever way was necessary. That's amore!!!

The couple tanned, talked and eventually dove head first into the ocean -- kinda like how they're diving back into their relationship. After a dip off the Amalfi Coast, they got back on the boat ... only to get into yacht's mini pool. Why settle for just salt water, right?

It's a big year for Ryan -- not only has he reconciled with his gal, but he's also in talks with Disney at the moment for a massive new contract to continue hosting 'AI.'

What do you get a billionaire like Mark Cuban? A healthy snack, for starters.

The "Shark Tank" star and Dallas Mavericks owner hit up The Happiest Place on Earth Wednesday and took a break from milling around with the summertime masses to chow on some popcorn and down some bottled agua.

Mark was there with his wife, Tiffany, and their 3 kids -- Alexis, Alyssa and Jake. The Cuban fam was joined by some friends as they hit up the Indiana Jones Adventure and the all-new Star Wars: Galaxy's Edge.

Looks like the billionaire's in fully vacay mode. Just a couple of days ago, he went on a fishing trip with his son.

BTW ... the Cubans looove them some Mickey. They were also at Disneyland and California Adventure Park less than a month ago.

Megan Thee Stallion, Nicki Minaj and Ty Dolla $ign's "Hot Girl Summer" got chilled down by LAPD who nearly torpedoed their music video -- but there's a happy ending. Ya like those, right?

Sources close to the situation tell TMZ, cops crashed Meg's attempt to shoot her video for 'HGS' last Friday, in the Mount Olympus neighborhood of L.A. -- right in the heart of the Hollywood Hills.

The reason? We're told she didn't have the proper permits.

Major drag too ... because our sources say Meg and her featured guests, Nicki and Ty, were all set to go at a house they'd booked as the main set for the shoot. Nicki and Meg were in costume, rocking matching neon striped outfits, which showed off all their good sides. As in, all of them!!!

The problem is ... someone snitched!!! Law enforcement sources tell us someone called the cops, and officers rolled up to find production didn't have the necessary paperwork. LAPD sent everyone packing, shutting down production.

Not to worry though, Stallionaires ... we're told Meg and co. improvised and were able to lock down another location about 50 miles East of L.A. in Chino Hills. It's just like the Hollywood Hills ... of Chino, anyway.

We're told the team was able to finish the scenes they needed without issues that same night, and the music video is scheduled to be released as planned.

Spoiler alert ... this thing appears to feature some wild animal cameos. Saddle up, folks!!!

Kylie Jenner is riding into 22 with a firm grip on her man -- she and Travis Scott did some tandem jet skiing as part of her outrageous birthday celebration at sea.

Kylie's moved the party into the Mediterranean Saturday -- her actual birthday -- off the coast of Italy. She and her baby daddy are cruising around with her closest GFs on their personal watercraft, as opposed to their OTHER "watercraft" ... the $250 million megayacht, "Tranquility."

And, check out the the birthday girl's sea-faring fashion sense -- an amazing technicolor swimsuit that definitely stands out ... as she always does.

The celebration's been going since the early hours of Saturday aboard their ship. KJ showed off one of her fabulous gifts from Trav ... a diamond chain with a massive pendant fashioned after her Kylie Lip Kit logo -- y'know that thing that made her so stinkin' rich.

It's a pretty sick piece, complete with liquid dripping off the lips ... all made of diamonds, of course.

Hey, we can't all be billionaires at 22, floating off the coast of Italy on a megayacht that costs $1.2 million per week to charter -- but at least we can all share in Kylie's fun.

Cameron Diaz here, checking in from the South of France to show you what it's like to quit your day job -- and it's working for her and her husband!!!

The actress-turned-semi-retiree and Benji Madden are living it up in St. Tropez where they made a huge splash together, literally. The couple took a dive off a luxury yacht and into the crystal clear blue waters. They hopped on what looks like a couple of motorized body boards and also did a little paddleboarding.

The couple's hanging with friends for a picture perfect vacay most of us would kill to take. Then again, most of us would also kill to quit our day jobs, which Cameron actually did. She's still making a splash -- though now it's a literal one -- after announcing she's done with acting ... for now.

Cam recently told InStyle, "The way I look at it is that I’ve given more than half of my life to the public. I feel it’s OK for me to take time for myself now to reorganize and choose how I want to come [back] into the world."

Kylie Jenner is plunking down $1.2 million a week to charter Tranquility, a 300-foot megayacht. By the way, add to that the fuel cost and at least a 30% gratuity for the crew of 29. Insane on so many levels, but there are other yachts that give hers a run for her money.

Check out what we found:

Flying Fox. She floats 446-feet strong ... dwarfing Tranquility!!! There are 54 crew members to tend to your every need. It can be yours -- temporarily -- for $4.4 million a week. The likes of Jeff Bezos have opened their wallets to roam the oceans blue on this incredible ship.

Sailing Yacht A. Holy crap!!! It's 468 feet. It accommodates 20 guests, with a crew of 54. It's got everything ... from a helipad to a spa and a gym, etc. etc. This $500 million boat is not for charter, but if ya know the owner -- Russian industrialist Andrey Melnichenko, well, you could get an invite.

Savannah. It's 272 feet, a little shy of Tranquility. But get this -- it has multiple pools and an underwater lounge!!! Kylie could've saved a little cash, because it charters for $1.36 mil a week.

Alfa Nero. Getting a little cramped -- 266 feet long. It has an infinity pool and a helipad and there are 26 crew members for a maximum of 12 guests. It's yours for $922,500 a week.

Leonardo DiCaprio doesn't need a flamethrower -- like he did in his latest role -- while yachting with his GF, because there's plenty of heat on board ... and we ain't talking about the hot tub water temp.

The "Once Upon a Time in Hollywood" star and model/actress Camila Morrone were very cozy on the top deck of their luxury yacht in Positano, Italy. The couple's enjoying some R&R in the hot tub now that Leo's completed all his media duties leading up to his latest big screen release.

After you're done checking out Leo's alleged "dad bod" and Camila's flawless curves in a white one-piece ... check out where the hot tub's situated in this mega-yacht. The layout begs the question ... does Leo's ride beat Kylie's birthday luxury yacht? Debatable.

Anyway, Leo and Camila -- who've been together for about 18 months now -- do have some company with them, but the hot tub looks to be a couples only zone.

Single mom life seems to be treating Irina Shayk well so far -- VERY well based on how incredible she looks on a family vacay in Spain ... with Bradley Cooper nowhere in sight.

The supermodel's enjoying some yacht and beach time in Ibiza with her daughter, Lea De Seine, Tuesday and it looks like Irina's mom, Olga, was part of the girl squad too.

Irina stood out like she normally does, but even more so thanks to a sexy lime green swimsuit accentuating her figure ... as she hopped off the boat and took a dip in the sea. Wonder if she was inspired by Rita Ora?

We're told Irina and her family had yachts of fun for a few hours before heading back to land and calling it a day.

As we've reported ... Shayk and Cooper agreed last month to share custody of their daughter and live in the same city. Looks like Bradley's might have to step up his vacay game when it's his time with Lea.

The ex-couple started dating in 2015 and had their baby girl in March 2017.

This summer is looking ab-solutely scorching hot!!!

These sexy stars are making their way outdoors to to burn up the Hollywood scene by doing cool things like hiking, beaching and taking a dip in the pool ... the tops are coming off and the shirtless selfies are taking over social media.

See all the flexin' fellas ripping things up this season by flipping through our gallery of hot summer stomachs -- Get a really good look at the celebs showing off their six packs and pecks -- then see if you can guess which jacked star is responsible for the real heat.