Birthdays

Kristen Stewart didn't quite step out in her birthday suit on her born day ... but still left little to the imagination.

She was out with her gf, Stella Maxwell, in New Orleans rocking a crop top -- no bra -- and short shorts. Stella wore pretty much the same kinda outfit.

Paris Jackson's birthday looked like a typical teen's Monday -- eating Mickey D's, smoking cigs, hanging with friends -- which is a full 180 from when she was a kid.

She celebrated 19 by chillin' outside a friend's apartment ... possibly the most casual party ever for Hollywood royalty.

Can't blame Paris though for toning things down. Her childhood was nothing short of a media circus ... hidden behind veils, paparazzi and bodyguards at every turn.

She's earned some normalcy. Happy 19th, PJ!

Dennis Quaid got his birthday celebration started early with a serious check of the ole ticker involving his girlfriend ... and a roller coaster.

Dennis and model Santa Auzina -- who's 30, btw -- hit up Six Flags Magic Mountain over the weekend and strapped themselves in for high-speed fun, and a lot of screaming.

He'll turn 63 on Sunday.

If the ride doesn't make him feel young, something tells us Santa will.

Floyd Mayweather channeled his inner-Bob Barker for his son's 16th birthday party ... 'cause he gave away A BRAND NEW CAR!!!!!

The guest of honor was Zion Mayweather -- who was celebrated with a live performance from Young Thug while go-go dancers busted out bottle service (non-alcoholic, we think)!!

There was 360 degree photo booth, pool tables and one of those "money machines" -- where you stand in the glass case and collect all the bills you can grab in 30 seconds while a fan blows the cash around.

Oh, and Zion also got a brand new Mercedes-Benz ... so, yeah ... he's happy!

Fetty Wap's moving past his robbery by spending quality time with his baby girl, who just turned 1 -- and whose best present didn't cost a dime.

We got Fetty Saturday night at Lure, and asked him about 1-year-old Khari's birthday party this weekend, and what kind of gifts she got.

Not only did he come up with the perfect answer, he also included some props to Masika, Khari's mom.

#SmartDad

Lady Gaga stepped deeper into her dirty 30s by cleaning up real good -- dressing to the nines and looking chic for her 31st birthday bash.

Gaga headed to dinner at Gjelina in Venice Tuesday for the star-studded event.

Elton John and Johnny Depp joined in ... even if a little underdressed compared to the bday girl.

"Cash Me Outside" girl Danielle Bregoli celebrated a big one Sunday night ... she just turned 14, and she says Dr. Phil's an "asshole" for not wishing her happy birthday.

Danielle has just about exhausted her 15 minutes, but there's no evidence her time is up. Quite the opposite, she just made a deal for a TV show and she dined at old line Dan Tana's in WeHo.

Elton John turned 70 over the weekend ... holy crap.

As you might imagine, Sir Elton's birthday party Saturday night drew a HUGE celeb crowd at Red Studios Hollywood, as well as some kick-ass performances.

Stevie Wonder played ... so did Lady Gaga. Meanwhile the crowd was full of stars like Katy Perry, Neil Patrick Harris, Rob Lowe, Kelly and Sharon Osbourne, James Corden, Jon Hamm, Jennifer Tilly, David Foster, Dakota Johnson, Matthew Morrison and Ryan Phillippe.

Even at 70 ... Elton's still standing ... and playing.

Bow Wow celebrated his big 3-0 two weeks ago but that hasn't stopped his party train from rolling into strip club after strip club with stacks to blow.

Bow Wow's latest stop was Club Onyx in Dallas Wednesday. It was thrown together last minute but Bow Wow still managed to shell out over $15k on the dance floor and even got a FaceTime call from Snoop!

You'd think 9 parties deep into celebrating his birthday he'd be done, but he's got 2 more coming up this weekend.

Robin Thicke made sure his 40th birthday was literally fun for the whole family -- adults and his 6-year-old son alike.

Robin hosted a luau-themed bash at his Malibu pad Sunday, and Julian was in the thick of it with some cousins and friends there too.

The adult guests included Adrien Brody, Angelica Bridges, Russell Simmons, Orlando Bloom and his son ... and, of course, Robin's gf April Love Geary.

As for the party -- magic show, 2-story water slide, mechanical shark, petting zoo, face painting ... in other words every kid's dream. They had hula dancers too ... fun for kids and adults.

Sources close to Robin tell us he was thinking "family first" when he planned the event.

Paula Patton was not there, but as we reported ... she and Robin are getting close to settling their custody war.

Model Hailey Clauson is all about the plus-size model movement, but only from the sidelines ... based on what she told us about her birthday celebration, anyway.

We got Hailey at LAX -- she turned 22 on Tuesday -- and she made it clear she wouldn't be indulging too much ... due to work. Translation: I don't wanna look fat for a photo shoot!

Still, she's clearly happy hers isn't the only body type killing it in modeling these days.

Bottom line? Hailey's gonna have her cake, and eat it too. Later.

Danielle Bregoli's now getting true star treatment ... huge paydays for showing up at events and just being herself.

We're told Danielle is making more than $40k to do a meet and greet in May with fans at the Rolling Loud Music Festival.

The owner of the company throwing the festival tells us he also cut a deal to throw Danielle's 14th birthday bash in March, and she'll get a cut of the ticket sales.

Danielle's reps -- yeah, she has them -- tell us this is their new norm -- $30k minimum for appearances in the U.S. and $40k if she has to leave the country.

Floyd Mayweather wanted one gift for his 40th birthday in L.A. Thursday night ... not to have to talk about Conor McGregor... the question is, did he get it?

TMZ Sports got Mayweather leaving Roku in Hollywood, the first stop on his weekend-long massive 40th birthday blowout celebration.

Floyd talked to our cameras about the chinchilla floors in his whip, the RIDICULOUS watch on his wrist, even about his nephew, who he says is gonna run all his companies.

What he wouldn't talk about? Conor, saying he wanted to take his bday off from all the madness.

Happy birthday, champ (please, please get the fight made).

Selena Gomez missed out on The Weeknd's 27th birthday bash ... even though she picked up the nearly $30,000 tab for her bf.

The Weeknd's surprise party went down Monday night at Dave & Buster's in Hollywood, and his pals French Montana, 2 Chainz, Big Sean, Travis Scott, Migos and Bryson Tiller were all there. They enjoyed open bar and open games. Sources inside tell us Travis was tearing up Dance Dance Revolution.

We're told Abel and co. had the run of the place from 11 PM to 2 AM. Meanwhile, Selena was in NYC for Fashion Week ... but made sure to leave her credit card to handle all charges.

Ellen DeGeneres turned 59 ... and she can certainly draw a crowd.

Ellen celebrated at her Bev Hills home with lots of famous well-wishers, including Jimmy Kimmel, Bruno Mars, Channing Tatum, Gwyneth Paltrow, John Legend, Michael Keaton and Jessica Alba.

60 should be a blowout.

Future and Big Bank Black blazed their own party trail for a friend's birthday -- including a pit stop to rage with a busload of hot chicks -- but predictably ... it ended at the strip club.

The rappers were celebrating big record exec Ricardo's bday in Atlanta Wednesday night. They hit up STK steakhouse, shut it down for a private dinner, and dropped around $37k.

We're told the 3 amigos moved on to Gold Room nightclub -- open just for them -- and bussed in around 20 beautiful women to party. They spent $10k apiece in 2 1/2 hours.

Finally ... they left those hot chicks and met up with a new group at Platinum strip club, throwing down more than $15k for 30 minutes of entertainment.

So, if you're keeping track ... that's around $82k for Ricardo's birthday. Judging by the pics -- it was worth it.