The Kardashians

1:00 PM PT -- We've now learned Khloe and James did NOT need a permit to set off the fireworks. They did need the Coast Guard to sign off on the safety of the display, and they got that.

Khloe Kardashian and James Harden threw their own personal 4th of July with a GIANT fireworks display that woke up thousands of residents -- and city officials are scrambling to find out HOW it got approved.

The thunderous fireworks show -- visible from multiple towns along the oceanfront -- went on for 15 minutes at the stroke of midnight. TMZ has learned the whole thing was a yacht party for Harden's 26th birthday, and it was all on the up and up.

Law enforcement sources tell us a permit was issued to James and someone in the Kardashian family. Khloe had bragged about throwing the party for her BF, but nobody expected this kind of over-the-top display.

In fact, there's a mini-conspiracy theory brewing. We've spoken to the L.A. department that normally issues permits for fireworks in the marina ... and they did not sign off, and never would for such a display on a Tuesday night. We're told the display was far enough off shore to be outside of city jurisdiction.

We also spoke to an LA. City Councilman who is angry and trying to figure out who exactly OK'd the fireworks. One law enforcement official told us ... in 5 years he's never heard of a permit being issued for fireworks like this on a non-holiday.

It really is their world, the rest of us are just living in it.

Tyga's got the blueprint ... brag about having sex with your juuust 18-year-old GF Kylie Jenner -- and everyone will pay attention to your new music.

Tyga just dropped a new mixtape, which includes the song, "Stimulated" -- which includes lyrics like: "They say she young ... I shoulda waited ... She a big girl, dawg ... When she stimulated."

There's more ... like a direct reference to "penetration." The "young" line makes it seem like Tyga's talking about Kylie, but who knows?

There are signs of a possible reconciliation between Kourtney Kardashian and Scott Disick.

Scott has been posting pics of him back at the family home in Calabasas, chilling at the pool and lording over his brood.

Scott wrote, "Love coming home and seeing my little girl napping and looking this cute."

The post could simply signal visitation, but he certainly made himself at home.

Kim Kardashian hit up a Toys"R"Us in L.A. Saturday, and it looked a segment from that TV show, "Supermarket Sweep."

Kim's nephew Mason tagged along as she loaded her cart with goodies. She bought some mermaid toys, which probably has North West and Penelope's name on it, because the 2 little girls came face-to-face with a mermaid earlier in the week in St. Barts.

The Kardashian sisters are being called out by one of the biggest female stars in wrestling ... WWE superstar Natalya ... who says she's DYING to hit the mat with Kim and Khloe.

But here's the thing ... the "Total Divas" star doesn't really wanna beat up K&K ... sounds like she just wants to roll around with 'em for a little bit. Can you blame her?

Dear Vince McMahon ... please make this happen.

Kylie Jenner should snatch the $10 million to do a sex tape and never look back ... because no less a XXX authority than Larry Flynt Jr. says that's way more than she's worth on the open porn market.

The Hustler king was at Craig's Thursday night ... and we asked about the offer Vivid Entertainment has on the table for the 18-year-old to go all "Kim K. Superstar."

Larry laughs off the ass-tronomical figure, but does admit there's a market for Kylie -- and floats a hypothetical offer for her to do the nasty for Hustler.

Kourtney Kardashian ignored the issue of tanlines and donned a strappy bikini as she relaxed Thursday on the beach in St. Barts.

Meanwhile in Mexico, Scott Disick hung out with Joe Francis and Darren Dzienciol, who co-owns 1 OAK.

Being single seems to agree with both of them.

Kris Jenner has a lot of pull in Los Angeles ... but just because she unleashed her wrath on a longtime LA weatherman over social media, doesn't mean she got him fired despite all the rumors.

Sources close to the situation tell TMZ ... Kris had nothing to do with Garth Kemp's departure from his 17-year-long position as the KABC weatherman ... he actually left to pursue his dreams of being a voice over actor.

Rumors were flying around like crazy that Garth was forced out by head honchos at his ABC affiliated station because of Kris.

Back in June KJ put him on blast to millions of her Instagram followers ... calling him a bully after he talked smack about Kim and Kanye not having talent. We're told Kris only fired back on IG ... she never called the station and didn't want him to get fired.

Mama bird defending her family is one thing, but forcing a guy to get fired is something completely different.

Kylie Jenner has NO FEAR when it comes to diving in with Tyga -- the couple did some extreme hand holding down in St. Barts.

We're downplaying ... but this actually looks like one of the cooler things they've done since going all PDA after her 18th birthday. Tyga and Kylie went flyboarding during the family vacay on the Caribbean island-- and it looks like they're nailing it already.

Kourtney Kardashian's Instagram bikini body is like a Drake diss song ... at this point, she's just kicking a man while he's down.

This latest one was snapped while on vacation in St. Barts, with Kourt wearing a swimsuit that seemed to perfectly match her backdrop.

She should have captioned this pic "Back to Back."

Kylie Jenner and Tyga are now fair game for producers of "Keeping Up with the Kardashians" ... and it took no time at all for the cameras to capture their relationship.

The show didn't really touch on the relationship, because Kylie was 17 last season. But one birthday makes a big difference, so 'KUWTK' cameras were all rolling Tuesday during the family vacation in St. Barths.

Kylie Jenner has car problems ... she's got so many they don't fit in her garage, so she's getting rid of the Range Rover to make way for her new Ferrari and G-Wagon.

Kylie has a 2014 Range Rover Autobiography, which she's now selling through a private broker for $173k. Financing is NOT available. It's a cash only deal.

Kylie bought the Rover for $195k new and spent $25k tricking it out. It has 6,000 miles.

The freshly-minted 18-year-old has cars coming out of her ears. Tyga gave her the $260,000 Ferrari for her birthday, and she bought herself a new G-Wagon which is in the shop getting upgrades. And there's that red G-Wagon that was owned by Blac Chyna that Kylie drove to her birthday dinner, although she says she just borrowed it from Tyga.

So wanna buy a used car?

Friends of the Kardashians are saying Kris and company are incredulous Blac Chyna would even suggest Kylie would need her hand-me-down G-Wagon, and based on the pic TMZ obtained ... they have a point.

Check out the pic of Kris Jenner's Hidden Hills driveway ... 4 G-Wagons in park and Kylie's is in the shop getting tricked out.

The friends say Kylie got a new, military green G-Wagon several weeks ago and doesn't need a used one as a backup. Short story, the friends say the Kardashians can't believe people aren't buying the fact that Kylie was simply driving Tyga's G-Wagon to her birthday dinner.

Kylie Jenner is getting flooded with 7-figure offers ... to do porn.

TMZ has learned Vivid Entertainment has already fired off a letter to the freshly-minted adult, offering her a $10 million deal for a video featuring her and Tyga. Vivid honcho Steve Hirsch writes, "Kim's sex tape helped launch her career and would be nothing but positive for you."

Vivid has some stiff competition. BangYouLater sent its own written overture, offering $1.8 million up front, saying, "This event will make you even more famous than either Kim K or Paris Hilton."

BangYouLater is banking on a good performance by Tyga, writing, "Your scene must be at least 22 minutes in length."

Digital Playground is making a different pitch, claiming it produces the biggest porn movies in the biz, and asking Kylie to become its front woman. The company writes, "Now that you are of legal age, we would like to offer you the opportunity to be Digital Playground's Brand Ambassador!"

They also would like her to do porn: "We know you'll be great at this and with your banging body to match, maybe you'll be interested in becoming an adult star yourself! Join DigitalPlayground.com and be welcomed into a new, hornier family."

So many offers to juggle.

Kylie Jenner just touched down in Montreal to celebrate her 18th birthday where she'll be able to booze ... legally!

Kylie posted a video of herself first in a helicopter and then on a boat and it was all just to get to her party at Beachclub. We're told she's sans Tyga or any other family members.

The party, sponsored by InList, is open to the public and hundreds of screaming fans were there to greet her.

As for her drink of choice? We're told so far Kylie hasn't taken sip of alcohol even though it's totally legal in MTL.

Khloe Kardashian clearly didn't have Lamar Odom on her mind Friday night when she partied in Houston to celebrate James Harden's birthday.

The two were at Aristocratlifes Engineroom for Harden's upcoming 25th ... and we're told the two were VERY close through the whole event -- dancing together for several hours.

Harden celebrated with other NBA players Zach Randolph and Pat Beverley and there were posters congratulating him on his $200 million Adidas deal throughout the venue.

You might remember ... it was earlier this week where Khloe was allegedly ambushed by ex-hubby Lamar Odom outside of a Soul Cycle class.

One thing's for sure -- Khloe seems to have put Lamar behind her.