Stars In Heat

Zac Efron is showing plenty of skin for his new movie -- we've seen the photos -- but there is one body part he's not willing to put on camera ... his butt.

Zac continued filming "Dirty Grandpa" down in Georgia, and it looks like there's a naked motorcycle scene -- but for some reason Zac's a little ass-shy. A butt-double was photographed stepping in for Efron.

Based on pics ... you'd think Zac would be happy to flaunt his cheeks, but instead it was the double's butt in the spotlight.

If ya wanna know what Tyson Beckford's junk looks like -- ask Sheryl Underwood … because "The Talk" host got an eyeful of his manhood in Vegas this weekend.

Beckford made his Chippendales debut Friday night at the Rio -- and gave Sheryl a very up close and personal introduction to his man parts ... while slipping out of his towel and into briefs.

Watch the vid ... Sheryl might have gotten the "biggest" show, but the audience got something too.

Supermodel Tyson Beckford let his ding dong dance during his stripper debut with the Chippendales dancers ... and you may need to take a seat.

At 44, Beckford is probably twice the age of the other guys, but he held his own during practice, and really got the crowd going during last night's preview. Fair warning: this video may mesmerize ... think snake charmer.

When you snap out of it, you'll be happy to know he's the celebrity guest host for Chippendales at the Rio Casino in Vegas now through May 24th.

Sources say in the show he drops trou twice and it ALL COMES OUT ... but he cups it.

Of course we still have our favorite.

Tim McGraw ... talk about country strong.

Guests at the Hotel Del Coronado near San Diego were stunned when a semi-exposed and hairless Tim put on a gun show before performing at his own show later that night.

The country star -- who turns 48 today -- credits his godly physique to the Paleo diet and CrossFit.

Porn star Bonnie Rotten showcased the laws of our land better than any stupid attorney ever could -- by showing off her breasts all over New York City.

Bonnie was actually shooting a spread for Inked Magazine ... and took full advantage of the New York state law that allows women to go T-O-P-L-E-S-S in public.

Even though the heavily tatted Bonnie is a west coast chick -- she seemed to adapt very quickly to the Empire State's more liberal view of boobs.

Also obvious in this video ... all of Manhattan adapting to their view of Bonnie's boobs. Especially the tourists.

Zac Efron is a brief guy ... at least he was on the set of his new film "Dirty Grandpa."

Efron is filming down in Georgia on Tybee Island and Monday he appeared to be baring it all. No such luck, just nude colored undies.

Funny, we had him pegged as a boxer guy but we're pretty sure there's a lot of ladies (and guys) who don't mind undies this tight.

Gigi Hadid does not know how birthdays work -- instead of receiving gifts, she's giving them ... in the form of a hot new swimsuit photo shoot. Yes, it's a happy birthday ... for us all!

Hadid celebrated her 20th on Thursday by posing for a bunch of photos in Miami and, thankfully ... changing into a bunch of colorful and revealing swimsuits in the process.

It's funny that Rihanna is the one in Hawaii ... because we're the ones enjoying the view.

RiRi is island side for the marriage of long time assistant Jennifer Rosales -- going down Monday -- but instead of taking in epic shots of perfect sunsets, she spent a lot of time this weekend snapping selfies of her perfect parts ... and we ain't complaining.

Front, back, side to side ... she definitely got all the angles ... but the trip isn't about her, right? It's about love and marriage and ... blah, blah, blah.

The Seattle Seahawks stormed the beach in Hawaii this week ... for a full, hardcore workout session on the sand ... in front of a bunch of normies trying to relax on the sand.

It's pretty cool -- imagine you're on a lounge chair with your pina colada ... when all of the sudden Russell Wilson, Richard Sherman and the rest of the squad roll up and start wind-sprinting!

BTW -- Richard was wearing those 5-toed shoe thingies ... and the whole gang brought it together for a group huddle at the end of the training sesh.

Check out the pics.

Selena Gomez ditched her ill-fitting pink bikini for a smoking hot black number as she partied again Thursday in the water while on vacation in Mexico.

Gomez took some flak for the previous day's photos -- haters said she looked like she put on a few pounds -- but swimsuit experts (in our newsroom) say this black one just fits her new body type WAY better than the pink one.

Selena responded to the criticism on Instagram -- borrowing a page from the Cindy Crawford "post a hot pic after a bad one comes out" playbook -- saying she's happy with her body.

Based on the pics she's posting ... she's also very happy chillin' at Casa Aramara -- Joe Francis' estate outside Puerto Vallarta.

Selena Gomez didn't pull any strings in Puerto Vallarta ... dammit.

Biebs' former squeeze was showing off the goods during her Mexican vacay ... sporting a double-stringed bikini bottom thingy (we know fashion).

There's not a ton of material to her ensemble, but what there is -- is definitely working overtime to cover the 22-year-old's assets. Things are getting thick down in Mexico.

You can only see part of Gigi Hadid at Qatar's main airport, because a vigilant team is on hand to cover-up pictures of her erogenous zone.

We found this really interesting. Magazines that come into the country -- mostly from the UK -- are scrutinized by the government for "excessive revelations of bodily parts."

The team has trusty magic markers ready to black out anything deemed offensive. If the pics really cross the line, the offensive images are ripped out entirely.

We're told the team actually roams the kiosks for new material. Passengers say they can smell the fresh ink.

A passenger at Qatar's Hamad International Airport landed Tuesday and saw another pic blacked out ... this one showing Bethany Hamilton, a professional surfer.

Also interesting ... the cleavage portion of the photos are untouched.

Qatar is one of the more progressive countries in the Middle East. Many others ban such pictures altogether.

Courtney Stodden had a serious wardrobe malfunction ... her top didn't fly off as planned, so she just jiggled it away.

It's so thirsty it's almost endearing. Courtney was throwing a football in Marina del Rey Monday and you see the disappointment in her face when her bikini top misses its cue.

Watch the video -- in fact watch it several times -- as Courtney vigorously shimmies it off.

Once it falls, you hear her feign shock in her finest Valley "Oh my Gaud!!!"

Even if you're not a fan, she definitely deserves the boobie prize for this stunt.

"Wolf of Wall Street" star Margot Robbie's boyfriend has his hands full ... of that ass.

Looks like Robbie and aspiring director BF Tom Ackerley want everyone to know they're not only in deep, but they're also not afraid to put the PDA on full throttle .. the two went at it Monday on the streets of Toronto.

No doubt she'll be slipping into something tight for her role as the Joker's squeeze, Harley Quinn, in the upcoming DC Comic bad boy blockbuster, "Suicide Squad" ... which she's up there filming.

This is Rumer Willis leaving a "Dancing With the Stars" rehearsal -- or more accurately ... it's Rumer's perfect ass leaving rehearsal.

On fleek ... comes to mind.

Rumer's already taken the MVA (most valuable asset) on this season of 'DWTS' -- and a lot of people who give a crap about that show ... think she's a lock to win the mirror ball thingy in the finale.

Don't all guys sit around the house like this???

Here's soccer superstar Cristiano Ronaldo ... striking a very spread eagle-ish pose to promote his new CR7 underwear line.

According to the press release, Ronaldo's new undies are supposed to be super soft thanks to "superfine microfiber" material.