Beauty

Are we in for another walk-off?

"Zoolander 2" is shaping up to be the king of cameos ... as Ben Stiller just revealed Justin Bieber will make an appearance in the flick.

Bieber has hinted he might be appearing, writing, "Working on something big right now in Europe. To learn more follow me on Fahlo. He is so hot right now."

The photo kind of lets the cat out of the bag.

No word on what Biebs will do in the cameo ... maybe he's a graduate of "The Derek Zoolander Center For Kids Who Can't Read Good And Wanna Learn To Do Other Stuff Good Too."

It's been a while since we've seen 75-year-old Tina Turner out and about ... and after seeing how good she's looking these days, we gotta ask ... why the hell isn't she out more???

Turner emerged Tuesday on the streets of Milan for a shopping trip with hubby Erwin Bach.

Private dancing keeps you young.

Russell Wilson is having one hell of an off-season ... he just walked in to the White House State dinner with Ciara on his arm .... and she's looking DAMN FINE!!!!!

Rumors had been swirling about the Seattle Seahawks QB secretly dating the R&B singer ... but now, it appears to be official -- with Wilson bringing her as his date for dinner with President Obama and the Prime Minister of Japan.

Before Ciara came into the picture, Wilson -- who divorced his wife last year -- was spotted out with Sports Illustrated Swimsuit Edition model Samantha Hoopes ... but clearly, she's out -- Ciara's in.

Mazel!

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.

Big Ang is out and about and flaunting new blonde locks ... just a few weeks after undergoing a lifesaving operation to remove a cancerous tumor from her neck.

The "Mob Wives" star was looking good Saturday outside Teak restaurant in Red Bank, NJ, and even stopped to pose with a fan. We're guessing the neckerchief is there to cover any surgery scars -- in the most stylish way possible.

Sources close to Ang tell us she lightened up before the surgery ... because she felt like she just needed a change after getting the cancer diagnosis.

Work it, Ang.

Brad Pitt's face is indestructible -- a fact whoever (or whatever) hit Brad should have known before attempting to disfigure our national treasure.

Brad showed up for a charity event in Hollywood Saturday night with a big bruise that starts under his left eye, and trails under his nose.

Most people would've stayed home with that kind of scarring, but most people don't have BP's genes. No clue what's behind this crime against beauty -- we've got a call in to his rep.

When it comes to good looks ... Al Pacino is anything but a "Scarface."

Here's a 39-year-old version of the "Michael Corleone" stud at a celebrity benefit back in 1979 (left) and 36 years later ... the godfather of cool -- who is celebrating his 75th birthday this weekend -- at a NYC movie theater last month (right).

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.

Pretty funny moment on "Inside the NBA" Wednesday night ... when Charles Barkley and Shaq watched the TMZ Sports clip of NBA commish Adam Silver having to choose which star has the better bald head.

Of course, Silver picked Sir Charles ... and raved about how good looking of a man he is.

Barkley's reaction was hilarious.

Charles Barkley has been called a lot of things ... a lot of which we can't publish here ... but now he can add "incredibly good looking guy" to the list ... thanks to NBA commish Adam Silver.

Silver -- who was honored as one of Time Magazine's 100 Most Influential People -- is also a proud follically challenged man ... so we asked him to pick the best bald head on the set of "Inside the NBA."

That's when Silver began to gush about Sir Chuck ... explaining that Barkley is more than just a guy with a GREAT bald head, he's also one of the best looking guys in the sport.

Blac Chyna has gone all high school on Kylie Jenner, posting a cartoonish pic of herself mocking the lip challenge of her nemesis.

Tyga must be chuckling ... his baby mama and current "girlfriend" embroiled in a lip lock.

The Houston Texans have somehow found a way to combine two things guys love -- football and twins -- and they've done it in the best possible way.

The Houston Texans Cheerleading Team is about to head out on location to shoot their new calendar in Puerto Rico, so naturally they snapped a few photos of the girls to get ready.

The team did a photo shoot of the 13 girls chosen for the 12 months, with one lucky month getting extra attention in the form of a pair of redheads who are new to the team.

Kylie finally responded to the trend, tweeting, "I'm not here to try & encourage people/young girls to look like me or to think this is the way they should look … I want to encourage people/young girls like me to be YOURSELF & not be afraid to experiment w your look."

The #kyliejennerchallenge has caused some of Kylie Jenner's super fans big problems ... and it's not just their giant lips.

It was bound to happen ... a day after the hashtag blew up online, complaints and pics of disturbing injuries from pissed fans who pushed the limits are now flooding social media.

Before you search #KylieJennerChallengeGoneWrong we have to warn you ... some of the injuries are EXTREMELY GRAPHIC ... ranging from simple bruises to extensive trauma requiring hospitalization.

Keep in mind Kylie never asked anyone to plump up but some of the results have been painful to say the least. Some recent tweets include ... "my lips bleeding and they hurt like hell" and "god help my lips."

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.

Kylie Jenner pretty clearly has a fan base that wants her lips, whether they're real or not.

Truth be told, our office is divided. The guys think these girls in the video are mocking Kylie by putting their lips inside a bottle to swell them up, but the women in the office say the girls are trying to be just like the youngest Jenner. Since the men here have never been teenage girls, the women win.

The hashtag, #kyliejennerchallenge, is blowing up.

BTW Kylie has insisted in the past, "These plastic surgery rumors hurt my feelings to be honest and are kinda insulting ... Just in case anyone forgot... I'm 16."

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.