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Justin Bieber just wowed the crowd at Kendrick Lamar and SZA’s "Grand National Tour" ... making a surprise appearance at the Friday night concert in Los Angeles' SoFi Stadium -- and getting a bit handsy with SZA.

The pop star joined SZA for their remix of her hit song "Snooze" ... and he was totally into their performance, vibing with his co-collaborator on stage and even kissing her hand multiple times.

They seemed to have a fun and flirty connection ... dancing together as they finished the song and hugging each other to celebrate a job well done.

Britney Spears caused a huge scene on a flight back from Mexico ... and TMZ has obtained a photo of her on the jet ... and you can tell why folks in her orbit are concerned.

An emotional Britney has lotion or sunscreen slathered all over her right arm. It appears she's speaking to a woman, presumably a flight attendant.

We broke the story ... Britney was flying with her security Thursday from Cabo San Lucas to LAX when she started drinking ... and then lit up a cigarette and started smoking.

Your mission here should be to track down the discreet changes of the two pics of Quavo ... it's Memorial Day weekend indeed, and we're giving you your star moment right here, right now! Are you ready to shine?!

"Too Blessed" to be stressed, the 34-year-old pulled up to Post Malone's concert and posed backstage. The rapper rocked a ripped and rugged American Flag ensemble -- and showed off his grill and some arm candy.

Throw on your boots and "Go Off" on these two swaggy shots!

Billy Joel says he's been diagnosed with a brain disorder ... and as a result, he's canceling all of his scheduled concerts.

The singer announced Friday he is suffering from Normal Pressure Hydrocephalus ... which is a brain disorder where excess fluid accumulates in the brain's fluid-filled cavities.

Billy says his condition has been exacerbated by his recent concert performances ... and he's having trouble hearing, seeing and balancing.

Miley Cyrus' recent infection was like a wrecking ball to her knee ... 'cause she caught something that started to "disintegrate" the area -- after rolling around the Hollywood Walk of Fame.

The singer-songwriter appeared on "Jimmy Kimmel Live!" Thursday night to talk about her upcoming album and accompanying film "Something Beautiful" ... and, Jimmy joked Miley's lucky she wasn't stabbed by a loose needle while rolling around on Hollywood Boulevard.

Cyrus says she didn't end up with a needle to the eye ... but, a few weeks after the shoot, she ended up in the ICU -- mainly because of a space issue instead of the serious nature of the infection.

The former drummer for the metal-core band The Devil Wears Prada was killed in a plane crash early Thursday morning in San Diego, TMZ has learned from his family.

Larry Williams tells TMZ ... his son, Daniel, was among the victims of the Cessna crash around 4 AM, which set part of a residential neighborhood of U.S. Navy-owned housing on fire. Several people on the ground were hurt in the fire and one home was destroyed.

Larry tells us the family is confident he was on the plane and they know there were no survivors -- but they have yet to get an official confirmation from authorities, which is making the entire situation even worse.

Justin Bieber just can't catch a break these days ... because he got a parking ticket Tuesday in L.A., and it was all caught on video -- and so was his crotch grab!

TMZ obtained footage of the troubled singer walking out of a commercial bank in Bev Hills — only to have a surprise waiting for him on the windshield of his Mercedes G-Wagon parked out front ... an annoying parking ticket.

Our sources say earlier, Bieber had difficulties trying to park the sizable vehicle inside a garage because the G-Wagon exceeded the height limit.

3:53 AM PT -- Kneecap has slammed the UK government after band member Liam O'Hanna -- stage name Mo Chara -- was charged with a terrorism offense, calling the move "political policing."

The band as a whole says they vehemently deny any "offense" and question the Metropolitan Police's motives.

They claim the "carnival of distraction" takes away from the real story -- genocide -- and accuse the UK of abetting "slaughter and famine in Gaza."

The post wraps ... "We stand proudly with the people. You stand complicit with the war criminals. We are on the right side of history. You are not. We will fight you in your court. We will win. Free Palestine."

Liam O'Hanna -- a member of the Irish-language rap group Kneecap -- has been charged with a terrorism offense ... according to the Metropolitan Police in London.

The rapper -- who goes by his Irish name Liam Óg Ó hAnnaidh online -- was charged with displaying a flag in support of the terrorist organization Hezbollah.

The incident in question appears to be related to a November 2024 concert, where Liam held out a bright yellow flag with green lettering ... which appears to be a flag of the terrorist group.

SZA's Los Angeles stint for her "Grand National" tour is off to a depressing start ... the R&B star claims she persuaded a child to forfeit their fruity whippet at an In-N-Out parking lot!!!

The "Kill Bill" singer didn't specify how old she thought the young fan was, but says she convinced them to hand over a can of SuperWhip strawberry-banana-flavored nitrous oxide, in exchange for a photo/video for their IG ... where are the parents?!?

SZA says she'll do everything in her power to help change the scenario, but ripped America for making drugs so marketable and alluring to children.

American musician and songwriter Morris Day -- and the funky frontman for the Minnesota music consortium, The Time -- was in his mid-20s when he shot to stardom with jams like "Jungle Love" in the '80s.

His charting single "Fishnet" reached number 23 on the Hot 100 chart, and with his popular bops, Day dabbled on the big screen -- playing himself in Prince's 1984 movie "Purple Rain" and "Graffiti Bridge" (1990).

As far as TV acting roles -- he was on NBC's sitcom series "227" with Marla Gibbs and ABC's "New Attitude" with Sheryl Lee Ralph.

Flutter kicks may get the chicks, but can you dive into these before-and-after shots and guess who owns this incredible celebrity transformation bod?!

Here are a few clues: He's a country music artist who grew up in the South. He's got three precious kiddos. If you can guess who he is, then you're getting "One Thing Right."

France will make you dance and so will these Camila Cabello bae-cay pics! Hop on board as we take you to Cannes with the sexy singer ...

The 28-year-old Cuba native captured the essence of Cannes in France, one photo at a time -- sailing the Mediterranean Sea, soakin' up the vacay vibes and enjoying some "gace 🍦."

Showin' some leg to her millions of fans, Camilla hit the dock and lounged for an effortless and elegant selfie -- donning this white frilly ensemble.

Camila kicks off her "Yours, C Tour" on June 28th ... She posted to her Instagram story, "guys I miss you I can't wait for tour 😭."

Beyoncé's "Cowboy Carter" tour is bringing out a crowd straight out of a saloon in the Old West ... 'cause a fight broke out during another one of her shows!

The singer-songwriter played Chicago's Soldier Field earlier this week and -- after taking the stage two hours later due to severe weather -- she played all of her hits ... including the soulful "II HANDS II HEAVEN."

While Bey sings the calming gospel-country song, it seems some took it as an opportunity to bring their hands down away from heaven and toward each other's face ... rumbling on the stadium floor.

Singer Tyla is lettin' loose, havin' the time of her life in Jamaica -- and her steamy vacay pics will "make you sweat, make you hotter, make you lose your breath, make you water!"

Since grabbing the attention of millions with her 2019 debut single "Getting Late," Tyla knows how to work it, even when she's not holdin' the mic!

Take a peek at this silver metallic bikini she rocked while sprawling out on a beach lounge chair ... Her angles always hit right!

Foo Fighters drummer Josh Freese surprised fans today when he announced the band called him Monday and told him they decided "to go in a different direction."

In Josh's post on Instagram, he says he wasn't given a reason why ... but he isn't angry, just more shocked and disappointed because of how much he's enjoyed the past two years.

We reached out to a rep for the Foo Fighters to get their side of the firing ... they had no comment.

Justin Bieber is shrinking his circle and some people who have been cut out say he's being isolated from longtime friends because he's in a cult and his church pastor is wielding a ton of influence over his life ... but the pastor says that's bogus.

TMZ has a new documentary, "TMZ Investigates: What Happened to Justin Bieber," now available on Hulu, and part of our investigation digs into Justin's involvement in his church, Churchome, in Beverly Hills.

Justin is no longer friends with Ryan Good, the best man at Bieber's wedding and the creative director at JB's fashion brand Drew House, and our sources say it has to do with Ryan leaving Churchome because he thought it was a cult.