Stars In Heat

Amber Alert!

It was the battle of the animal print bikini bottoms, as bronzed beyond belief Italian fashion designer Roberto Cavalli charred his fine leather goods in pair of skimpy man panties with a much younger lady on a yacht in Monaco this weekend.

For once in her life, Victoria's Secret supermodel Adriana Lima did not look smokin' hot in lingerie ... because she was too busy looking smokin' hot in a bikini.

The gorgeous 31-year-old mother of two showcased her flawless golden mamacita curves by modeling a bunch of tiny sexy two-piece swimsuits for a photo shoot in St. Barts on Wednesday.

Blake Lively is bootylicious.

Wearing an old school Jennifer Lopez diva hat, a '70s black mini-dress and a ridiculously hot pair of open-toed thigh-high boots, the happily married 25-year-old former "Gossip Girl" star strutted her gorgeous blonde and leggy stuff on the streets of New York City on Tuesday.

Apparently the high fashion walk off was all part of some magazine photo shoot, but who really cares about that ... the important thing is that she looks AMAZING!

Damn you, Ryan Reynolds! Damn you.

Zac Efron proved he's got game ... by flaunting his jacked-up rock hard chest on the set of his new flick.

With his shirt casually unbuttoned all the way, the toned 25-year-old stud played some basketball -- and showed off his ridiculously sculpted pecs and abs -- while filming "Townies" in L.A. on Tuesday.

Last month, Zac injured his right hand on set ... but everything appears to have healed quite beautifully.

Zac may be the one with the ball, but it's everyone else who has to worry about dribbling.

Attention West Beverly High alumni: Steve Sanders is jacked.

Former "Beverly Hills, 90210" star Ian Ziering is getting pumped for his upcoming gig stripping with the yoked man panty crew of Chippendales ... by working out -- with a photographer on hand -- in Studio City on Thursday.

While the 49-year-old's shirtless Vegas stint doesn't start until June ... he's already showing off his peach pits.

WWE Vice President Stephanie McMahon is 36 years old ... a mother of three ... and she's more beefed up than Outback Steakhouse.

Stephanie usually keeps her physique hidden beneath a trademark business suit -- but TMZ has obtained these pics from an upcoming photo shoot for RxMuscle.com, finally revealing the Billion Dollar Princess in all her muscular glory.

As for what keeps her in shape -- Steph is a scary good boxer ... and obviously eats really well (under the tutelage of bodybuilding legend and diet guru Dave Palumbo).

Paulina Gretzky just posted this photo on Instagram.

Like a lot of sunbathers in Europe, Bruce Jenner went topless on the beach in Greece on Monday.

Throwing modesty out to sea, the 63-year-old showed off his smooth and supple Olympic gold medal-winning chest and rippling abs while paddleboarding in a pair of festive high-waisted board shorts on the Aegean Sea.

Kendall isn't the only Jenner showing off in a bathing suit.

We're not Kendall Jenner's self-proclaimed creepy older sister Kim Kardashian ... but if we were ... we would LOVE these incredible bikini photos the 17-year-old just posted on the Internet.

Of course, Kim perved out over her younger sister's physique in a video she made earlier this month, gushing over Kendall's underage bod ... so just imagine what she'd say about these new pics:

"OMG guys. Just look at my gorgeous supermodel sister Kendall Jenner. She's on vacation in Greece right now and she's so hot and skinny in her little bikini. I'm so jealous. Just look at her body. LOOK AT HER. EVERYBODY LOOK AT MY SISTER RIGHT NOW."

"I know this sounds creepy. Because it is."

Check out Kim's original creeper video below ... but don't watch too closely, you might get arrested.

Newly single Julianne Hough and her "Vampire Diaries" star BFF Nina Dobrev like to french ... braid their hair on the beach.

In a scene straight out of a porn film -- minus all the nudity and sex -- the orange bikini babes engaged in an innocent three-way hair braiding session with a third adult female friend while bronzing their supple flesh on a public Miami beach.

Coldplay lead singer Chris Martin proved being married to the World's Most Beautiful Woman can be a hairy situation ... by going shirtless in London this weekend.

The pasty 36-year-old Mr. Gwyneth Paltrow showed off his surprisingly fit and hirsute hipster torso on what must have been a rare warm and sunny spring day in England.

No word if he was wearing underwear underneath his outfit.

Your keys, your phone, your wallet ... all things that people commonly lose. Luckily for you, these sleek celebrity hunks lost their shirts.

Check out these supple celebrity torsos as the glisten under the sun!

The late '90s were good to Erykah Badu -- she had a bunch of hits, starred in some flicks ... so maybe that's why she was rockin' her best 1998 henna tattoos in Miami on Thursday.

The 42-year-old mother of three debuted her latest highlighted hair-tastrophe and showed off her temporarily inked up limbs while hanging out in a bikini in South Beach.

Since her split with Ryan Seacrest, Julianne Hough has really let herself go ... on vacation.

A little over a month since the former couple announced they'd gone their separate ways, the 24-year-old blonde beauty showed off her single and ready to mingle hot body while enjoying a drink at a hotel in Miami on Friday.

She's back in the dating pool.

While tanning her ridiculous badonkadonk, bootyful model Vida Guerra nearly devoured her entire thong bikini bottom in Miami on Wednesday.

Bun appetit.