Hot Bodies

Tim Tebow can't sing.

He can't even pretend to sing.

But damn ... dude is jacked.

Tim is a contender on Thursday's "Lip Sync Battle" -- and one of his songs is "Eye of the Tiger" by Survivor.

Right from the beginning, Tim abandons the faux vocal part of the show ... instead, spending most of his time flexing ... while Chrissy Teigen fawns over him from the DJ booth.

Ariel Winter enjoyed the spoils of turning 18 ... partying at an L.A. hot spot and showing off her body -- so we're guessing her BF had a good time too.

The "Modern Family" star and Laurent Gaudette hit up The Nice Guy Sunday night where she celebrated her recent 18th birthday in an outfit that was long on legs, and heavy on cleavage.

'Vampire Diaries' star Nina Dobrev does not fear the sun.

Dobrev, who left CW's hit show last year after six seasons ... soaked up the surf and sand over the weekend with her pals in Maui.

Nina's found new and exciting ways to entertain us.

It's not just the players enjoyin' some fun in the sun in Hawaii for the Pro Bowl -- some of the best cheerleaders in the league also got a trip out to the island ... and they look goooooood!!

Check out these pics of some of the NFL's finest showing off their all star physiques -- it's impressive.

Ronda Rousey slapped on a new coat of paint -- a very thin one -- for a new S.I. swimsuit photo shoot in the Bahamas.

The ex-champ's clearly getting used to being naked, essentially, in front of strangers -- and, truth be told, we're getting used to it too.

This is round 2 for Ronda in body paint. TMZ Sports got the first shots of her spread 3 weeks ago on Petite Martinique.

It's a battle of the Barbies!

Here's Mattel's new modern version of the doll nicknamed "Curvy Barbie" in a sensible outfit and ergonomic footwear (left) and the long-standing OG Barbie in a black and white one piece with strappy black heels (right).

The question is ...

Britney Spears made a bunch of black and white videos that look like the most awesome #flashbackfriday ... on a Tuesday.

Although it's unclear what she's teasing in the videos, TMZ has learned that Britney is feeling great, getting ready for her revamp Vegas show and just having a good time with social media.

The clips are amazing, though possibly too hot to watch for too long -- especially at work.

It's like early 2000s Pepsi all over again. The commercials, not the soda.

Before she gained fame for being Tyga's close ... um, friend ... model Val Mercado put in some serious work in a lot of bikinis.

Check out her swimsuit photo shoot from last year in Miami.

Zac Efron could actually make the "Baywatch" remake work, even if the script sucks.

Zac was taking swimming lessons Thursday to sharpen his skills for the role.

Verdict -- he's plenty sharp already.

'Bachelor' contestant Lauren Bushnell still has a ways to go to the final rose, but she's a total winner in a bikini.

Lauren B. hit the beach in Cabo San Lucas with her family.

There are still 17 ladies left in the 'Bachelor' house this season -- and Lauren, a flight attendant, is definitely a frontrunner ... with fans, anyway. There are even rumors she won the whole thing.

Lauren's next one-on-one date with Ben H. better require a bikini! For her, not him.

If Usher can act as well as he throws a punch, he's gonna kill as boxing legend Sugar Ray Leonard in the upcoming Roberto Duran biopic "Hands of Stone."

Usher's actually been training for 2 years at Decatur Boxing Club outside Atlanta. The club's owner Xavier Biggs tells us his student put in two-a-days -- 2 hours a day, 6 days a week and even met with Sugar Ray to prepare for the role in the film.

Filming has wrapped, but Usher hasn't stopped climbing into the ring. Biggs -- whose brother won Olympic gold -- says the singer's gotten so good he can hang with the pros.

Manti Te'o has officially rebounded from Lennay Kekua (R.I.P.) ... and his new girlfriend is a smokin' hot model.

Here's Atlanta Falcons linebacker Kroy Biermann proving bikini bottoms aren't just for women -- rockin' a pair of grape smugglers on a beach vacation with is famous reality star wife.

Khloe Kardashian flashed her hot pink, deeep V as she stepped out in NYC.

Settle down, the V of which we speak is merely the extremely plunging front of the ridiculously hot dress she wore to "Live! with Kelly and Michael."

She's definitely stepped up her style game during her NY promo tour -- but consider this: Khloe told Howard Stern she plans to get a boob job in the future. Now imagine the pink dress, post surgery.

Ummm ... get this chick to Bev Hills, STAT!

Rapper Mike Stud is no dummy ... putting his smokin' hot model GF Josie Canseco front and center (in a thong) in his new music video for his song "Anyone Else" ... and TMZ Sports has the footage.

Stud and Josie -- daughter of the baseball legend -- have been dating for a while ... and Stud wrote the song about her.

You gotta watch the entire thing ... Josie (who's already been featured on SI.com) flaunts her insane physique while eating pizza and a grilled cheese sandwich.

Enjoy!

Here's the Team USA men's gymnastics team showing off their ridiculous, shredded physiques on a beach in Brazil.

It appears the guys are there to get in some training sessions in preparation for the 2016 Summer Olympics ... which are set to go down in Rio.

Nice speedos.

#GoUSA