Summer/Beach

Kourtney Kardashian's Instagram bikini body is like a Drake diss song ... at this point, she's just kicking a man while he's down.

This latest one was snapped while on vacation in St. Barts, with Kourt wearing a swimsuit that seemed to perfectly match her backdrop.

She should have captioned this pic "Back to Back."

Alessandra Ambrosio may not be able to solve Greece's debt crisis ... but her visit to the country is certainly upping its babe factor.

Jessica Alba's amazing body, and bank account, were on full display in Cancun.

The 34-year-old mother of two was enjoying a fabulous vacation this weekend -- no doubt celebrating her killer figure ... and her Honest Company recently being valued at $1.7 billion!

Cash Warren -- already the luckiest guy on Earth -- just got way luckier.

Tyga and Kylie Jenner are finally doing it -- all the PDA they want ... during their Mexican turn up for her 18th birthday.

They've got a full fiesta going at Joe Francis' estate ... and a ton of company for the celebration. Kendall Jenner, Hailey Baldwin, Pia Mia and, of course, Joe were all out on the beach on Wednesday.

Interesting, when they brought out the Sea-Doo ... Tyga had no problem riding bitch behind Kylie.

Anne Hathaway took a spraying of water to the face courtesy of hubby, Adam Shulman, as the two enjoyed a day in the water in Ibiza.

So do you think he's doing it to be nice, or is it more of a "Billy Madison" situation?

Bethenny Frankel is her own best walking advertisement.

Frankel -- who's 44, by the way -- looked more ripped than the Atlantic cooling off in the Hamptons with a Skinnygirl beverage in hand.

The New York 'Housewife' was there for "Paddle for Pink," a paddleboarding charity event that raises money for breast cancer awareness.

Exercise and a healthy diet ... sure do Bethenny's body good. That string bikini doesn't hurt either.

Justin Bieber's fully naked ass hanging out on a boat deck ... or the gorgeous deep blue water of Bora Bora -- what are you really staring at in this pic?

It's okay. We'll give you a moment to think about your answer.

Justin just pulled his own version of "Break the Internet" ... with this nude pic of himself standing on the deck of a boat in the world famous lagoon.

Still thinking? We know. Stupid island pics are a dime a dozen.

Apply sunscreen liberally, Biebs!

Shemar Moore engaged in some all-American guy fun -- flashing his sexy, rippling muscles on South Beach ... just long enough to get CRUSHED into the sand by another dude.

The "Criminal Minds" star kicked off his holiday early -- chilling with his cousin, who is such a MASSIVE slab o' man ... he tossed 6'1" Shemar around like a rag doll. A stupidly chiseled rag doll, but still ...

Kate Hudson hitting a topless beach in Greece with her GFs sounds like the start of a beautiful thing -- and could have been ... if Kate understood how peer pressure's supposed to work.

Kate chose to keep her bikini top on, while her pals frolicked. It's unclear why she didn't let her girls run free -- maybe she spotted cameras nearby.

Hudson has been on vacation with her estranged hubby Matt Bellamy ... even though he's been hanging with a new blonde.

As for the beach -- we're pretty sure "When in Rome" applies, Kate. Even in Greece.

That giant inflatable swan Taylor Swift and Calvin Harris rode into the California sunset this week isn’t just making a big splash in the pool … it’s making a bigger one at the bank.

Sales for the floating swan have skyrocketed according to manufacturer Swimline, thanks to the pro-bono marketing from celebs like Kim Kardashian, Kate Upton, Kendall Jenner and Zooey Deschanel, who have all been pictured on it. Taylor and Calvin are just the latest in a long line.

Swimline says they sold 41,000 swans in the first six months of 2015 alone. At $49.99 a bird, that’s a $2 million payday. Not bad compared to $400k total sales in 2013.

As for a black swan … Swimline tried, but the black prototypes got too hot in the sun. But hope isn't lost ...they’re testing out different materials for next year.

They like giving celebs the bird.

No boys gonna take Cyndi Lauper and hide her away from the rest of the world.

The 61-year-old pop legend is hitting the beach this week in St. Tropez ... in a GIANT floppy hat. Fair-skinned Cyndi's not taking any chances with that Mediterranean soleil.

Wladimir Klitschko may be the heavyweight champion of the world, but he's about to get his ass kicked by his 5' fiancee.

Wlad took baby Kaya out into the Miami beach surf, while Hayden Panettiere was doing 'GMA' in NYC.

It looks like fun and games, but we're guessing Hayden will have issues:

-- the baby doesn't have a life jacket

-- Wlad is clowning off balance in the surf, with Kaya in a precarious position

-- she's not wearing a hat in the Miami sun

That said, dad is no ordinary father at 6'6" and 246 lbs. Kaya's in good hands. Of course, Hayden might not see it that way.

Good luck Wlad ... we're rooting for you!.

This just in from Katie Couric ... America's sweetheart has cleavage and she ain't afraid to show it off ... even at 58.

The former TV host/anchor was looking good in a low-cut one piece down in Barbados. She hit the beach with new hubby John Molner -- and even got a little frisky in the water.

Actress/singer Zoe Kravitz donned what barely qualifies as a bikini as she frolicked in the ocean ... Wednesday in Miami.

Serena Williams took a well-deserved break after winning the U.S. Open, relaxing on a beach in Miami with Eva Longoria over the weekend.

The rising sea levels have swallowed up the beach along Malibu Colony, the gated community which houses some of the biggest celebs in the country.

The waves are way more than a nuisance ... they've been known to destroy homes, piers and other structures in the past.

Any attempt to sandbag the area seems pretty futile until the waves recede.