Paparazzi Photo

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.

Hilary Duff is staying above water when it comes to motherhood.

Hilary's soakin' up the sun with her son, Luca, and friends over in Hawaii. She's taking it all in -- some fun on a paddle board, catching some rays and definitely some waves ... all in mommy mode.

Motherhood suits her well ... especially in a striped bathing suit, despite it being understandably PG.

Iggy Azalea still has ex French Montana wrapped around her little fingers.

The "Mo Bounce" rapper stepped out Thursday in West Hollywood wearing the diamond bands French gifted her almost a year ago, when they were still a thing.

Iggy hasn't had great luck with rings in the past ... she gave back her huge yellow engagement rock from Nick Young after they broke things off, but it looks like it's a different story with the $100k in ice from French.

Iggy's been linked to other dudes since ... and no word on who this guy is, but it looks like she's still on good terms with French.

Beyonce and Jay-Z aren't letting parenthood -- or L.A. traffic -- cramp their social lives.

Bey and Jay hit up Sushi Park Wednesday night in WeHo to itch their sushi craving. Sushi Park's one of the trendiest joints in L.A., but Hova's face might suggest he wasn't all that in the mood. Then again ... they're living out in Malibu right now, so even a chauffeur-driven ride into town can be aggravating.

Either way ... Jay's digging QT time with Bey, who continues slaying in anything she wears. Remember what she was rocking on their last night out?

#WhatTwins

"Deadpool 2" is coming in hot and loaded -- literally -- with the unveiling of Domino.

Zazie Beetz -- best known for her role on FX's "Atlanta" -- will star as the savage mercenary Domino, who ultimately joins the good guys. Beetz was filming alongside her stunt double in Vancouver, and buzz about her debut started building after Ryan Reynolds tweeted a photo of Zazie in her costume.

Her look was so on point, even Deadpool comic book artist, Rob Liefeld, roared with approval on Twitter.

Jennifer Garner's not just good at getting along with her ex -- she's still totally cool with his mom too.

Jen was out for a walk Tuesday with Ben Affleck's mother, Chris, in Brentwood ... and they looked like 2 old friends yukkin' it up.

As we've reported, Jen and Ben have been doing the co-parenting thing like pros, while also having fun with their own friends. But clearly, for Jen anyway, family is family.

Besides ... always a good idea to keep Grandma happy.

Justin Bieber's blood father is back on the scene ... just days after some huge events in his son's life, and word he had been leaning on Pastor Carl Lentz for fatherly guidance.

Bieber's pops, Jeremy, flew to L.A. from Ontario, Canada over the weekend with Justin's younger brother, Jaxon, in tow. Jeremy was seen driving around town in a convertible ... tailing Justin who was in his own vehicle.

Sources connected to Bieber say Jeremy's visit is absolutely a direct response to Justin's tumultuous week -- from pulling the plug on the Purpose tour, to accidentally hitting a pap with his truck.

And there's this -- as we first reported, Lentz has stepped up over the last several months as a father figure ... spending time with Justin on the road, and back home in Los Angeles. He's the one Justin turned to when he wanted to discuss ending the tour.

Our sources say Justin's had little, if any, relationship with Jeremy all year. It appears the last time they were together was around Christmastime. We're told Jeremy's here now because he just wanted to reconnect and hang with his kid.

So far, so good. Justin's been pretty chill during the visit.

Kendall Jenner's a well-known supporter of the "Free the Nipple" movement -- and on Sunday, she proved her advocacy yet again.

The model was seen out Sunday in NYC in a barely there see-through red blouse, which put her assets on full display.

This definitely isn't her first time unburdening her nips -- she was recently doing just that at a beach party in Mykonos ... and who could forget last year's hang out sesh with her girls?

It's about 80 degrees in the city right now ... looks like she must've caught a draft here.

Chester Bennington's family and closest friends gathered for a private funeral near his home in Palos Verdes, CA.

A couple hundred people attended the service Saturday afternoon at South Coast Botanic Garden -- many of the guests were musicians who'd played or toured with Chester and Linkin Park. A full stage, including a drum kit, was set up for musical tributes to be performed.

Police provided tight security at the event. As TMZ first reported ... the family opted for a private funeral, instead of a massive open service. Instead, fans have organized numerous memorials around the globe for the frontman, who hanged himself just over a week ago.

Fittingly, all funeral attendees had to have wrist bands and an access pass -- similar to most concert VIP passes.

Chester was 41. #RIP

Great news -- Jennifer Lopez and Alex Rodriguez woke up with even more chiseled bodies! Now back to your doughnut.

The couple got in a yoga workout Friday in NYC, and based on this glimpse of their abs ... it was a good one. Not that it shows -- even a little -- but this was the day after Alex celebrated his 42nd birthday ... and a few days after J Lo's 48th!

As the saying goes: couples that sweat together ... make other couples super envious.

Kate Hudson has pulled a G.I. Jane (and countless other badass Hollywood heroines) by completely shaving her famous golden locks ... and like all of them, she looks great.

Kate was seen on set Tuesday in L.A. for a new flick she's working on with Sia, and she's rocking a new shaved 'do for the role.

Gotta say, as well as she wears it ... we almost didn't recognize her here at first.

Going bald seems to be back in style in Tinseltown. Cara Delevingne recently did the same for a movie, as did Kristen Stewart and, of course, Millie Bobby Brown for her role as Eleven in "Stranger Things."

Keep on buzzing, ladies.

Forget steroids, Jose Canseco's legacy is his smoldering daughter, Josie Canseco -- who set Miami Beach on fire this week during a trip with her boyfriend, Mike Stud.

The two showed some serious skin during a jet skiing session this week ... but all eyes were on Josie and the white hot bikini.

The fashion model and the rapper have been dating since 2015 -- with Stud even featuring Canseco in some of his music videos.

Can you blame him?

Robby Hayes and Amanda Stanton are now a thing, thanks to "Bachelor in Paradise." Oh, and ... spoiler alert.

Amanda and Robby were hand-in-hand for a weekend stroll in WeHo. We're not judging, but seems like they're already coordinating their wardrobes (Ok, we're judging).

They were both down in Mexico shooting the upcoming 'BiP' season ... and maybe the third time will be the charm for Amanda. She finished fourth on Ben Higgins' 'Bachelor' season, and was briefly engaged to Josh Murray before calling it off in December 2016.

Robby was the runner-up on JoJo Fletcher's season.

If at first you don't succeed ... get recast!

Jessica Alba's got her third bun in the oven ... and she's making sure it gets plenty of sun.

Alba's currently enjoying summer in Hawaii on the heels of news she's having another kid. She's already mom to 2 daughters -- 9-year-old Honor and 5-year-old Haven -- with husband Cash Warren.

Justin Bieber always marches to the beat of his own drum, and that beat's telling him to free his nipples ... in convenience stores ... apparently.

Justin looked like your typical teenager in Arizona or Florida when he hit up a 7-Eleven Saturday night. Of course, the Biebs was in Beverly Hills ... where ya don't typically see topless folks ... famous or not.

We're pretty sure no one complained about topless Bieber. Still, we'd implore him to not just observe all posted rules, but -- "Learn it. Know it. Live it."

Jeremy Meeks has a super tight grip on his gf Chloe Green ... so tight, it's like she stands to inherit a $5 billion fortune or something.

The ex-con and the Topshop heiress were out in Bev Hills Friday running the typical errands -- drug store run, smoothies and totally 100% authentic, impromptu make out session for the paparazzi.

Jeremy -- who just filed for separation from his wife, Melissa -- told us last week things are getting serious with Chloe.