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Paul Walker's birthday was truly a bitter/sweet occasion for a dear friend and family member.

Tuesday would've been Paul's 44th bday, and his Uncle Rhett and childhood pal marked it with a visit to Paul's L.A. burial site -- and they didn't come empty handed. They each left a package of Red Vines, and his uncle included a note about time, healing, and this: "Miss you f***er! I remember it all!"

Not sure about the Red Vines -- maybe they were Paul's fave -- but witnesses say Rhett got very emotional during the visit.

His tribute to Paul -- who died nearly 4 years ago -- also had this note: "Ask your self? W.W.P.W.4.D"

RIP

Kendall Jenner and Blake Griffin just took a major step in their dating life -- 'cause nothing says "we're together" like dinner and a movie ... and a 2,475 mile trip.

The rumored couple was spotted grabbing a bite Monday night in NYC at Carbone, and then catching the new horror flick "It" afterward.

Speaking of flying, Blake clearly jetted off to New York to be with Kendall ... who's walking runways for Fashion Week. They'd been seen hanging in L.A. (with pals) prior to this.

If they keep this up ... they'll float too.

Leonardo DiCaprio's still holding on to old flames ... until he notices he's been spotted by the paps.

Leo was seen leaving 1 Oak in NYC early Saturday morning -- around 5 AM -- tightly holding hands with ex-gf and Victoria's Secret model Toni Garrn. We're told he arrived at the club earlier with a couple other gal pals, but left with Toni ... and a bodyguard.

We're told the 2 quickly separated once they saw their pic being taken ... but got back together later.

Leo and Toni starting dating back in 2013, but broke it off after about a year ... then she started dating NBA star Chandler Parsons. Garrn and Parsons split in November.

Nice rebound for Toni.

Hilary Duff celebrated Labor Day with her son at the beach, and buried any ill will for her ex-husband in the sand ... all in the name of co-parenting.

Hilary and her ex, Mike Comrie, spent Monday in Malibu with their 5-year-old son, Luca. Hil was rockin' her usual 2-piece in the water while Mike chilled onshore.

Getting together for some R&R with their kid is right up the former couple's alley, post-divorce. They went on a family vacay last year to Maui ... so Labor Day teamwork seems to be a walk in the park for them.

What helps Kevin Durant dominate on the court, makes him suck at stand up paddleboarding.

KD totally looked like a fish (a really big one) out of water as he attempted to get up on a board in Maui. Looks like he quickly discovered 7 feet -- or just under that -- is a whole lot of body to balance, but it is Labor Day weekend after all.

Kev eventually opted for the not-as-cool, yet way more stable move of paddling from his knees.

Can't knock the hustle, but maybe he should take a page out of his teammate Steph Curry's Hawaiian playbook when it comes to beach activities.

Conor McGregor looks every bit like a guy who has 100 million reasons to smile and laugh -- even with a big ole shiner -- and did just that for a friend's wedding in Ibiza.

The UFC champ looked like the life of the party during the Sunday wedding and reception. Conor and his gf, Dee Devlin, jetted over to the event ... one week removed from his awesomely entertaining fight with Floyd Mayweather.

As we showed you ... Conor's been partying as if HE'd won the fight, and he kept that going with his pals. Yeah, he's still sporting a black eye, but he's clearly not the least bit down about it.

$100 million does a lot for your mood.

Lil Wayne continues playing with fire by downing sizzurp, and there's plenty of visual evidence he's been doing it regularly for months leading up to his latest seizure.

TMZ broke the story ... Wayne was hospitalized Sunday night in Chicago after suffering multiple epileptic seizures. He's always insisted the attacks are purely due to his epilepsy -- but it's known that large amounts of sizzurp, or lean, can trigger seizures.

You'll recall, Weezy was hitting the stuff hard in June 2016, when he suffered another round of seizures. We wondered if he'd eased off since then, but these photos -- from February through August of this year -- show him consistently rocking the double cup ... commonly used for the codeine cough syrup concoction.

As we told you, Wayne canceled a Sunday night Vegas gig due to hospitalization. As for his condition now -- we've reached out to his camp, but no word back.

Instead of heading outta town for Labor Day weekend ... Orlando Bloom, Kourtney Kardashian, Robin Thicke and Katie Holmes grabbed their mini-mes and soaked up a Malibu tradition.

They were all spotted at Malibu Kiwanis Chili Cook-Off -- which has been a thing for 36 years now. Orlando rode the giant swinging chairs Sunday with his adorable 6-year-old son, Flynn -- and Kourtney also did some carnival rides with her kids.

Scott Disick was there too, but with a new chick. Also taking in the fun ... Kendall Jenner and apparent new bf Blake Griffin, Anthony Kiedis and even Tom Hanks.

Kendall Jenner and Blake Griffin are playing it cool in the midst of an L.A. heatwave ... and also with what sure as hell looks like their new relationship.

For the third time in a week, Kendall and the hoops superstar hung out together -- this time they were beating the heat on the beach in Malibu. She was laughing and looked smitten, but still no PDA ... on camera, anyway.

Just like their other dates ... Blake and Kendall were with a group of friends. Neither's confirming they're a couple, but the "just hanging with our pals" cover only works for so long.

Something's cooking ... besides Blake's balls. Jeans on the beach in 90 degree temps, playa??!!

Taylor Swift might not venture out in public very often these days, but she's proving she's just like the rest of us in one way -- she'll always show up for a friend's wedding.

Taylor was spotted out for the first time in months Saturday, carrying the back of her friend Abigail's wedding dress as they arrived at the church in Martha's Vineyard. We're told Tay's in a wine red dress like the rest of the bridesmaids, and the ceremony's going on right now.

It's been a crazy few weeks for Swift -- a victory in her butt groping case, a new song, and a reheated feud with Kanye -- but she still hadn't come out of hiding ... until now.

She was also a bridesmaid -- the maid of honor to be exact -- at her friend Britany's wedding in February 2016.

Seems to be her thing.

Amal Clooney had twins 3 months ago, at least that's the story they're telling ... but judging from this pic we have our doubts.

George and Amal chowed down with Matt Damon and his wife, Luciana Barroso at Ristorante Da Ivo in Venice, Italy.

They're in Venice for the 74th annual Venice Film Festival, where George is unveiling his new movie, "Suburbicon."

They just do it better than everyone else. They just do.

Frankie Muniz let the dancing cat out of the bag -- before "Dancing With the Stars" confirmed he's joining the show ... he showed up for practice.

Paps got Frankie Thursday in L.A. showing up for a little 2-step with Witney Carson, the pro dancer who'll obviously be teaching him the ropes. Frankie will be joining Nick and Vanessa Lachey and "Property Brothers" star Drew Scott this season.

Singer and actor Jordan Fisher and ex-NBA star Derek Fisher are also said to be among the cast.

Mary J. Blige went searching for a real lovely tan ... and seemed to find it poolside in Miami.

Mary was lounging Tuesday in Miami Beach where she was rockin' a skimpy bikini and showing off her banging bod from the front and the back.

The 46-year-old superstar is one of a handful of artists who had to postpone shows in Houston over the weekend due to Hurricane Harvey. Looks like she's putting her downtime to good use.

Strength of a woman, indeed.

Chris Pratt is sticking to what he knows in the fallout of his separation from estranged wife Anna Faris ... and that involves family and faith.

Chris was out Sunday taking his 4-year-old son, Jack, to Church in L.A. -- with Anna nowhere in sight. It appears to be the first time he's been seen public since his split from Anna last weekend ... when the ex-couple announced they were separating on social media.

We broke the story ... Chris and Anna are parting ways because of differences in their vision on family and work -- she wants to have more kids and to settle down in L.A., while Chris doesn't want to do either considering his movie career is just now taking off.

Still ... Chris seems to be trying to keep things normal between he and his boy. As normal as they can be without mom, anyway. Also, check out his ring finger ... stripped.

Kylie Jenner's man, Travis Scott, put a big smile on her face ... and that's even before they got home.

KJ was grinning Sunday night on her way out of Staples Center, where she saw Travis open for Kendrick Lamar on the Damn. tour. That look on Kylie's face -- and the fact she even showed up at the concert -- definitely refutes the rumors she and Trav had broken up.

She got goosebumps, and he got a handful after the show ... just a guess.

Caitlyn Jenner did not wear a "Make America Great Again" hat Thursday as a show of support for Donald Trump ... it was a mistake tied to golf, a convertible, Starbucks and a purse.

Caitlyn tells TMZ she drove from her Malibu home to Sherwood Country Club in Thousand Oaks, CA, in a 1960 Austin-Healey convertible. Before leaving home she realized she needed a hat ... something better than a golf visor to protect her hair. So she rummaged through the 10 hats in her closet and grabbed one without looking at the stitching.

She says when she got to the club she threw the hat on the floor of the car, spent an hour or so hitting some balls and left. When she got to the car she grabbed the hat, saw the inscription and realized what she had done.

She tells us she was horrified because she now detests Trump after he tweeted about the military transgender ban. Caitlyn says, "What he's doing to our community is absolutely f***ing awful."

But Caitlyn had a dilemma on her hands ... wear the hat home or screw up her 'do. She chose the former, thinking no one was going to spot her. She wanted to stop at a Starbucks for a latte but exercised caution ... a mile from the coffee joint she switched to the golf visor and walked inside.

When Caitlyn left, she switched again, deciding to wear the Trump hat home. She got halfway to her property when she realized she left her purse at Starbucks, which contained, among other things, her cellphone. Caitlyn panicked and raced back to retrieve her purse, forgetting she was wearing the hat.

She ran inside, grabbed the purse and drove home. At some point she realized she still had the hat on but thought she could make it back undetected. She was wrong. Caitlyn says a photog snapped the pic somewhere between Starbucks and her Malibu home.

As for what to do with the hat, she's thinking of signing it and auctioning it off and giving the proceeds to a transgender cause. On the other hand, she might just rip it up or burn it.