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Justin Timberlake kicked off his new tour this week -- and his stage is already the talk of the town ... 'cause it defies the laws of physics Newton worked so hard to confirm!

JT debuted an awesome set design Monday for the first show of his Forget Tomorrow World Tour -- which officially got under at the inaugural stop in Vancouver, BC ... wowing the crowd at Rogers Arena with a massive floating stage for his performance of "Mirrors."

Check it out ... Justin is strapped into a safety harness as the elevated platform rocks back and forth -- letting concertgoers take it all in at various angles and vantage points.

Jon Bon Jovi is admitting he gave love a bad name during his early days on the music scene ... shedding light on his past as a hard-living and loving rockstar.

The Bon Jovi front man opened up to Michael Strahan for a new profile, confirming he was no saint when his rock band first found success in the '80s -- despite being in a committed relationship with high school sweetheart-turned-wife Dorothea.

He added ... "I got away with murder. I’m a rock and roll star, I’m not a saint. You know, I’m not saying that there weren’t 100 girls in my life. I’m Jon Bon Jovi! It was pretty good."

Selena Quintanilla's brother, A.B., III is offering up an apology after losing it on fans this weekend during a music festival in Texas ... and he's blaming the fact he was off his meds.

In a since-deleted video shared to Instagram, the musician -- who used to tour with his late sister -- said he regretted his behavior at the Tejano Explosion 2024 music festival, in San Antonio ... revealing he was forced to go off mental health medication amid a cancer scare weeks prior.

He explains ... "After Selena passed away, [mental health issues] came around. I became bipolar. I became OCD, ADD, PSTD [sic] ... I'm on the spectrum basically, for people who understand that."

There's no bad blood between exes Christie Brinkley and Billy Joel ... as the former spouses shared a sweet moment over the weekend -- where Bill was singing to her once again.

The supermodel attended her ex-hubby's concert at MSG Friday -- where she was filmed dancing along to Billy's hit "Uptown Girl" ... which was written about Christie back in the day.

Check it out ... Christie is seen grinning widely and swaying back and forth on the Jumbotron while watching her ex sing out his hit song. On its face, she was all about it.

Kate Hudson is launching her music career at the ripe age of 45 -- and to anyone who's doubting her, she's got choice words ... basically, the verbal equivalent of flipping the bird.

The actress opened up about her pivot into singing -- with a whole debut album coming out this May -- during an interview with CBS's "Sunday Morning" ... where she dished on the brutal feedback she once received on the notion of diving into music as a non-20-something.

She says ... "There was someone who said to me -- and it kind of jarred me a little -- it was when I was in my early 30s, and they basically said, ‘It’s done, it’s passed. You can’t, you’re too old.’ And you know, for me, it wasn’t just about being a performer, it was about wanting to write music."

Eric Church is doubling down on his spiritually-charged Stagecoach set ... despite the fact his performance appears to have left a lot of attendees thoroughly underwhelmed.

In response to the criticism -- check X and you'll see what we're talking about -- Eric defended his appearance at the famed music festival this weekend as the "most difficult set" of his career ... explaining he attempted to take a risk with an unexpected lineup.

For those who missed it, EC gave an unplugged performance of hymns and gospel covers, prompting several festivalgoers to bounce to Nickelback’s set at another stage. He was seated for most of the show ... and like we said, there really wasn't much to it besides him, his guitar and a choir.

*NSYNC's appearances over the last year have stirred up so much excitement that two major tour promoters are bidding on a possible reunion stadium tour ... convinced the group could pack stadiums and be one for the history books.

Sources familiar with the situation tell TMZ ... both Live Nation and AEG have thrown their hats in the ring, reaching out to the members of the popular boy band just a couple weeks ago to let the guys know they're down to explore the idea of a tour.

We're told their interest was piqued, especially after witnessing the love and support the group received last year when they reunited for a song in the latest 'Trolls' movie.

It might not be clear how pyramids were built, but if they're in ruins we certainly know why ... 'cause Robin Thicke's performance in Egypt may have brought them down!

The singer-songwriter played a wedding gig at the base of the architectural marvels Friday night at the Wedding of Ankur Jain and Erika Hammond -- a couple moguls who pulled out all the stops for their big night.

One of the many exciting surprises ... Thicke pulled up to croon a few tunes -- including iconic love song "Just the Two of Us" and man, the guy sounds fantastic.

Jelly Roll put a new spin on the country-themed Stagecoach Festival Friday night, cranking out a few rap songs while also bringing out T-Pain to add even more spice to the performance.

The country music star hit the T-Mobile Mane Stage in Indio, California, before a jam-packed crowd in Indio, California -- and announced there would be special guests.

T-Pain then strolled onstage and sang a medley of his rap tunes, which included his hit "Buy U a Drank." Pain and JR also rolled out their cover of the late Toby Keith's "Should've Been A Cowboy."

Sam Smith hit the beach to cap off the week -- and they bared it all out there ... rocking a de facto Speedo, and showing off some major PDA with a mystery man in the water.

The singer was in Miami Friday, where they stripped down a teeny-tiny bathing suit and got into the water ... with all their tattoos on display, including a Betty Boop one by their leg. There's lots of ink on Sam's body ... and they certainly gave folks an eyeful to take in.

While Sam was splashing around, a dude joined them and got a little touch-feely as well. While they were both neck-deep underwater, this fella started riding on SS like a horse.

No Doubt and Blake Shelton were living more than the "Simple Kind of Life" during Coachella ... renting out luxury villas in the desert -- and treating it like a big family vacay.

Eyewitnesses tell TMZ ... the Gwen Stefani-led popular '90s group rented villas at La Quinta Resort this past weekend while Coachella Weekend 2 went on -- shocking the resort guests.

The whole crew checked in on Friday and checked out Sunday ... a quick weekend trip specifically for Coachella.

Ciara is trying to drop major poundage after having her fourth baby -- and she's not afraid to show off the progress along the way ... including how much she weighs right now.

The singer posted a photo dump Thursday, which was basically just an update on her life. It included lots of different shots -- including her looking good in a car, her working out, her in the studio, her posing with famous pals, playing pickleball and her with her kids.

There was one photo in there, though, that caught the attention of fans ... it was a picture of a scale with a number on it, which seems to reflect Ciara's current weight.

Sorry, Beyhive ... it appears Beyoncé's not headin' to Indio this weekend -- 'cause a TikToker's seemingly found the real DJ Backwoods Barbie, and it ain't Bey!

User @beysus.christ -- obviously a Beyoncé superfan -- put on her internet detective hat and started chasing down leads in the "Who is DJ Backwoods Barbie???" mystery, and she posted her findings online, breaking the news gently she doesn't think Bey's coming to Stagecoach.

In the clip, beysus says she found a user on Instagram who commented about how excited they were to see DJ Backwoods Barbie on all of Barbie's IG posts and a post from the official Stagecoach account.

Pet Shop Boys singer Neil Tennant doesn't think Taylor Swift has any famous songs ... even though he's been presented with evidence to the contrary.

The British musician blasted Taylor's A-list status while recently chatting with The Guardian -- claiming she doesn't have enough hits to make her as big of an icon as Michael Jackson. You can tell his hot take had mixed reactions by the way people respond in the crowd.

He says, "Taylor Swift sort of fascinates me as a phenomenon because she’s so popular, and I sort of quite like the whole thing, but then when I listen to the records … for a phenomenon as big, where are the famous songs? What’s Taylor Swift’s 'Billie Jean'?"

Colt Ford is sharing his first health update in his own words since suffering from a heart attack -- and he's got one thing on his mind ... getting back onstage.

The country singer posted a video Wednesday, where he's speaking from his hospital bed ... and he shows off a huge post-surgery chest scar. He's not sugarcoating it ... admitting he's probably going to miss concerts for the rest of the year as he continues to recover.

Even though he's got a tough road ahead, Colt's determined to come back in a big way. He thanks fans for their well wishes and also drops some wisdom, reminding folks to take care of themselves because life's curveballs can sneak up on you when you least expect it.

Matty Healy's finally responding to Taylor Swift's diss track aimed at him -- but, fans aren't gonna get the drama they might've hoped for from him ... just the opposite, in fact.

The 1975 singer stepped out in Los Angeles Wednesday ... and, a photog asked him how he'd rank his diss track compared to the other 30 on Taylor's 11th studio album "The Tortured Poets Department."

Remember ... Taylor's new song "But Daddy I Love Him" seemingly mentions Healy and the criticism surrounding their whirlwind fling following her breakup with longtime partner Joe Alwyn last year. More of a diss track to her fans, really ... but Matty's central to all of it.