Hot Bodies

28-year-old Venezuelan fitness model/Instagram star Michelle Lewin reminded everyone that bikini season is almost upon us ... by wearing one in Miami this week in a way few can.

Ashley Tisdale celebrated her bachelorette party with pal Vanessa Hudgens on a huge yacht in Miami -- and Ash made sure to flaunt her ass in a tiny thong before it's, y'know ... locked down for life.

Thanks, bikinis!

Kim flashed her engagement ring for photogs ... and then she gave 'em the same rearview wedding guests will see walking down the aisle -- and it's glorious.

Supermodel Irina Shayk tried to call attention to the plight of the kidnapped Nigerian girls by posting her own #Bringourgirlsback photo.

Of course, she did hers TOPLESS! Sooo ... mission accomplished?

Happy thong Thursday from Italian model Claudia Romani.

Claudia's known for her achievements in smoking hottery -- especially on Miami's South Beach.

Watch the video. Her qualifications speak for themselves.

Jennifer Lopez and her mother were cruising through Manhattan when it happened -- our camera guy got the magical shot that proves Jenny from the block ... is also a chip off the ole one.

And Mama Lopez has all the proof (and junk) we need (in her trunk).

Jennifer Lopez and her mother were big hits walking the streets of Manhattan yesterday, and if you didn't know they were related ... a quick pan down of our camera revealed the family resemblance.

J. Lo and her mother, Guadalupe were shopping on Madison Ave. where they encountered a bunch of fans ... including one woman who joked she was happier to meet mom than J. Lo.

Jenny does talk to us about where she used to get her hair did -- but, honestly, it was hard to focus due to the view of mother and daughter butt ... and their shared DNA.

Justin Bieber had his young guns blazing ... losing his shirt for a horseback ride/homage to Russia's most famous topless equestrian.

Bieber traded his skateboard for a proper steed at a ranch just outside L.A. yesterday.

While Justin's cowboy hat was more Sinatra than Rogers -- his shirtless pose was totally reminiscent of Vladimir Putin's pose.

Don't worry ... we've got plenty of video of JB's ride with his posse (yeah, Lil Za rode too) for your viewing pleasure.

Chrissy Teigen needed to think LONG and hard to figure out her her all-time record for number of times having sex in a single day ... before giving us a mysterious response.

Chrissy was out in New York when we sprang the question -- specifically about her sex record with husband John Legend -- and for some reason she put us on hold while she went into a meeting, telling us ... "Ask it again."

50 minutes later we did ... and Chrissy finally gave up the goods.

Audrina Patridge is like a way hotter version of the groundhog ... who just poked her barely covered butt up out of the sand -- and good news!

It's officially bikini season. AP's ass said so.

How 'bout them Cowgirls???

The Dallas Cowboys cheerleading squad ran for the border this week ... hittin' up Cancun for a smokin' hot bikini calendar shoot ... and TMZ Sports has the pics.

They swam ... they frolicked in the sand ... they went on a boat -- and they documented every moment.

Madonna's not ACTUALLY a slutty attention whore who planned to expose her nipples at the fanciest event in the world -- literally dressed like Leeloo from "The Fifth Element" -- at least that's what she's saying now ... claiming the photo she posted online Monday was a joke.

Sources close to the singer tell TMZ, she was just kidding when she posted the photo with the caption, "What i wanted to wear to Met Ball but Anna [Wintour] said Not this year! So I'm gonna work on music instead?"

Our sources say Madonna didn't even have plans to go to the Gala ... she was in the studio Monday night during the event and will stay there all week.

This just in: Madonna is 55 years old.

Naya Rivera made men around the country gleeful when she was spotted out in Cabo this weekend wearing an incredibly tiny bikini.

No matter what happens with "Glee," it's clear Naya has the body of work to go far.

Did someone order a redheaded Prince?

Newly single and ready to mingle, Prince Harry hit up the pool at the Soho House in Miami Thursday while in town for a friend's bachelor party. Harry reportedly just broke up with Cressida Bonas after nearly two years together.

Harry and his friends partied at LIV nightclub at the Fontainebleau Hotel Wednesday night ... after dinner at Hakkasan. We're told Harry was rolling with about 13 guys at the club (not including security) and partied till about 2:30 AM.

Rihanna loves to be nekkid ... A LOT ... but Instagram says her displays of public nudity go way too far -- and is now threatening the singer within an inch of her exposed nipples.

Rihanna posted topless snaps Tuesday from her photo shoot with Lui, a French skin mag -- and within an hour IG yanked 'em down ... because they violated rules against nudity.

Our Instagram sources tell us Rihanna got an email that basically warned her ... keep your clothes on or risk having your account permanently shut down.

But like a bikini trying to contain her boobs -- IG couldn't stop RiRi ... and she just posted the banned nudes on Twitter instead.

Thank you, Twitter.