The Kardashians

5:55 P.M. PST -- A source close to the Kardashians tells TMZ, Kylie just happened to be driving the G-Wagon to her birthday dinner Friday night, but it's Tyga's SUV and not a birthday present. The source acknowledges it's the same G-Wagon Blac Chyna was driving.

Kylie Jenner got a spiffy red Mercedes G-Wagon from Tyga Friday, presumably for her 18th birthday. It's a used Mercedes, which is not a problem. The problem is who used it before her -- Blac Chyna!

Turns out Tyga bought the 2013 SUV new and gave it to baby mama and then-GF Blac Chyna. We're told Tyga was the registered owner of the whip, which was black. Blac Chyna had it re-painted white and then re-re painted pink.

Our sources say recently Tyga told Blac Chyna she had to get a new car and return the G-Wagon, which she did. We're told Tyga had it painted red, picked it up Friday and Friday night Kylie was behind the wheel.

The telltale sign ... the license number Blac Chyna had is the same as Kylie's.

Kylie Jenner was seeing red for her 18th, courtesy of Tyga, who gave her a spiffy, cherry G-Wagon, which she drove to Nobu during a big Kardashian birthday bash.

Tyga went to a dealership Friday afternoon and picked up the fancy Mercedes, which stickers for $115,000.

The fam celebrated at Nobu in Malibu, and just about everyone was there. Check out the video ... you see Kris and Caitlyn hug it out as they leave.

Happy almost birthday, Kylie.

Kim Kardashian is quickly achieving sainthood in the Big Easy by leaving an insane lunch tip Tuesday.

Kim -- along with BFFs Jonathan Cheban, Simon Huck and a few others -- hit up Brennan's. The bill came to $200, and she left a $300 tip.

The pregnant Mrs. West ordered eggs and french toast. Jonathan ordered turtle soup and although they say they were shocked it was made from real turtles, it didn't stop them from eating it.

Scott Disick got a harsh dose of reality Friday when he went solo to the wedding of a friend, and seemed to express regret over his breakup with Kourtney Kardashian.

Scott attended the wedding of J.J. Corsini in Santa Monica, and posted a pic of his seating card with the caption,

"When u realize the grass isn't always greener"

It's pretty stunning and an enormous departure from a guy who seemed to revel in his newly-found freedom.

It looks like he's made peace with Kourtney, at least to the extent they have some sort of temporary custody arrangement.

Kylie Jenner's turning 18 on Aug. 10th … but a celebration in the States is problematic, so we've learned she's headed to Canada to get legally wasted!

Kylie’s throwing a rager at Beachclub Montreal. It's Canada’s answer to Ibiza … a mini party island with a beach, pool, A-list DJs and lots of booze.

Here's the best part ... Kylie's being paid to celebrate her own birthday, and paid well ... we're told between $100k and $200k, just for showing up.

The club's owner, Olivier Primeau, is pulling out all the stops. Kylie will be choppered in, landing on a luxury boat that will dock next to a table stocked with bubbly. She'll also celebrate with a $3k cake.

That's not all that's legal in Canada at 18. Happy birthday ... Tyga.

Don't worry Rockets fans ... just because James Harden is banging a Kardashian doesn't mean he's gonna suck -- so says NBA legend Sidney Wicks.

Wicks spent 10 years in the NBA and was a 4-time All Star -- and insists that what happens in the bedroom doesn't really have an impact on the court.

"You date whoever you want as long as you're able to focus your lives and keep them separate," Wicks says.

Wicks also says Harden doesn't seem like the kind of guy that would be distracted by all the media fanfare that comes with dating Khloe K.

Kourtney Kardashian displayed an unusual amount of cleavage (for her) as she and the rest of the Kardashian clan went out for lunch after catching a show Sunday afternoon in Los Angeles.

Kourt is not one for such a revealing look, normally that's Kim ... but she was the conservative one for a change.

Scott Disick is in full-on single mode, partying in Vegas and making lots of bank at the same time.

Scott raked in $50K for his appearance Friday night at 1Oak at the Mirage in Vegas. He was heavily guarded ... the only ones able to penetrate security were pretty girls.

Scott left alone but his party pal Mally Mall breezed out in a party bus with 40 of his closest friends ... all extremely female.

Meanwhile, back at the ranch, Kourtney Kardashian Instagrammed this pic of her watching Scooby- Doo with her kid.

Different ways to spend Friday night.

Kim Kardashian had a brainstorm Friday night to help Twitter, and the co-founder sucked up to her almost instantly.

Kim tweeted, "I just emailed Twitter to see if they can add an edit feature so that when you misspell something u don't have to delete & repost. Let's see ..."

A half hour later, Twitter big wig Jack Dorsey responded like it was a cure for cancer ... "great idea! We're always looking at ways to make things faster and easier."

James Harden and Khloe Kardashian have a HUGE supporter (ask Lisa Ann) in John Salley ... who tells TMZ Sports he thinks it's a genius move for the NBA superstar.

Ex-NBA champ Salley was out at LAX when we asked if Harden was playing with fire by dating Khloe ... since it hasn't exactly worked out for the last few athletes who've gotten in deep with the Kardashian girls. Yeah, we're looking at you ... Kris Humphries, Lamar Odom, and Miles Austin.

Kylie Jenner should have been the focus at her graduation party Thursday night, but Khloe Kardashian's ass hijacked the event.

Kylie, along with her family and a few friends, celebrated KJ's graduation with a kick ass party at Kris' house. Kylie, who was homeschooled, received her diploma from Ryan Seacrest.

Kylie and Kendall are close, but who knew this close ... though it wasn't quite as awkward as the infamous "reach around video" ... but still.

Scott Disick and Kourtney Kardashian kept it civil Thursday, when they had a meal together with the kids.

Scott, Kourtney, Mason and Penelope all had lunch at the Beverly Hills Hotel. We don't know if baby Reign was there.

After lunch, they drove in separate cars to Scott's Hollywood Hills home where she handed off the kids so he could spend time with them.

As we reported, Kourtney was at a Century City building Monday, and although we don't know who she saw, it's the building where attorney Laura Wasser works. She repped Kim and Khloe in their divorces, and we know Kourtney wants to work out a custody arrangement.

Scott Disick has begun the family healing process ... spending Wednesday with his son.

Disick took five-year-old Mason to Barnes & Noble in Calabasas, where the kid loaded up on toys.

Scott and Mason then went for an early dinner at Rosti Cafe.

Although he's been out of the picture for the past month following his split with Kourtney, Disick kept in touch from a far ... mostly thanks to FaceTime.

Kim Kardashian clearly learned a lesson about what pregnant chicks should wear, because she's choosing comfort over fashion the second time around.

The big question: How the hell did she strap on those heels?

Screw the horse ... freshly single Khloe Kardashian's getting right back on the cow -- the cash cow that is her family's reality show.

Days after finally putting her Jane Hancock on docs to divorce Lamar Odom, Khloe reported for work decked out in virginal white. She was shooting a 'KUWTK' scene with Kris Jenner and sis Kourtney at a restaurant near their Calabasas homes.

Not that KK is living off Lamar's dough, anyway -- but good to know ... she's gonna make it after all!!

Khloe Kardashian and Lamar Odom have taken the final step in getting divorced ... TMZ has learned.

Khloe and Lamar both signed legal docs that will officially end their marriage. Court records show the documents were filed with the court Friday. All that's left is a judge's signature, and they're officially single.

It's been a long time coming. Khloe filed for divorce in December 2013 and sat on it for more than a year. There was no activity in the file, to the point the judge threatened to dismiss the case. As we reported, Khloe and Lamar both waffled on the divorce, and at times they talked reconciliation.

Khloe has clearly moved on. She's dating NBA superstar James Harden. As for Lamar, it seems he grudgingly went along with the divorce. He recently called Khloe "my girl."

We've learned Khloe and Lamar have reached a property settlement and the divorce could be official within days.