Coachella

Zedd and Olivia Culpo are THIS close to setting off the "New Couple Alert" ... 'cause they sure looked like a couple of crazy kids very much into each other after getting all cozy at Coachella!!!

We're told the famous Russian-German DJ and the former Miss Universe were cuddling in the artist area during Ariana Grande's set at Coachella. Check out the vid ... it appears Zedd had his arms around Olivia as Grande performed "God is a woman."

Witnesses tell us they were together for the whole set. His arms were around her as they swayed together. She would lean her head back on his chest ... the universal code for "I'm into you."

And, get this ... Zedd had a performance scheduled a few hours before Ariana's. When he went onstage ... guess who was backstage? Yup ... Olivia and her hot friends. But, here's what else is interesting ... this fling seems to come just days after Olivia was spotted with another star ... NHL's Aaron Varos.

Olivia and the New York Rangers star were on a double date just last week at Soho Hollywood. They were hanging with her best friend Cara Santana and Jesse Metcalfe. So, ya gotta wonder ... was Olivia's date with Varos a one-off and is Zedd more her jam???

Whatever the case ... one thing that seems certain -- Danny Amendola's in her rear-view mirror.

Joey Fatone isn't holding any grudges against Justin Timberlake for missing Ariana Grande's Coachella set ... but he also isn't guaranteeing any future 'NSYNC collabs.

We got Joe at LAX Monday -- a day after he and the guys performed with Ari, sans JT -- and he confirmed what TMZ first reported ... that Justin only skipped the show 'cause he was wrapping up his world tour.

Justin not being there didn't seem to affect the awesomeness of the performance -- Ari and 'NSYNC were definitely, well ... ya know, in sync. Lots of rehearsal time, as you might imagine.

For the record, Justin finished up his Man in the Woods tour Saturday night in Connecticut. If he wanted, he could've technically flown to SoCal and tried to make it work, but as we told you ... the issue was no rehearsal time. Joey backs that up, saying it would've been brutal for JT.

Justin Timberlake's noticeable absence from 'NSYNC's appearance at Coachella didn't have anything to do with bad blood ... he just couldn't find time to rehearse with his old bandmates.

Sources with knowledge tell TMZ ... Justin was approached along with the other members of 'NSYNC to do the surprise collab with Ariana Grande, but he ultimately said no because he was finishing up his rescheduled world tour.

We're told JT considered signing on and thought the idea was really cool ... but he just couldn't get his schedule lined up for rehearsals with Lance Bass, Joey Fatone, Chris Kirkpatrick and JC Chasez.

'NSYNC and Ariana slayed Coachella Sunday night ... with 4/5ths of her favorite boy band joining her onstage during her headlining set. As you can see, rehearsals were essential to the performance, and Ariana even told the crowd, "I've been rehearsing my whole f**king life for this moment."

Talented as Justin is ... he couldn't just show up off the street. Sounds like he got wind of the performance, though ... Monday morning, he gave Ariana and the guys a shout-out.

We know what you're thinking ... a couple years ago it seemed impossible JT would EVER perform with 'NSYNC again -- things got kinda nasty between them. But, pump your brakes ... a full-on tour is still a long shot, at best.

Ariana Grande's headlining set slayed at Coachella, and got an added boost by the long-awaited reunion of 4/5ths of her favorite boy band ... 'NSYNC.

Lance Bass, Joey Fatone, Chris Kirkpatrick and JC Chasez joined Ariana onstage Sunday night during her song "Break Up With Your Girlfriend, I'm Bored" -- which samples an old 'NSYNC hit -- then kicked the nostalgia into high gear by performing "Tearin' Up My Heart."

We broke the story of the surprise collab, including the fact Justin Timberlake wasn't going to be a part of it, but as you can see ... Grande filled in nicely for him.

At one point she announced to the crowd ... "I've been rehearsing my whole f**king life for this moment."

The big guest appearances during Ariana's set didn't stop with 'NSYNC -- Nicki Minaj also joined her and powered through some mic issues to do "Side To Side" and go out with a "Bang Bang."

Diddy and Mase took the stage with Grande, too.

Looks like JT missed out, but in his defense ... he just wrapped up his 115-show Man of the Woods tour the night before.

YG's party following his Coachella performance was busted up when someone opened fire outside the event -- causing a panic, just 2 weeks after his friend Nipsey Hussle's murder.

Hours after the rapper left the Coachella stage Sunday night, his after-party was going down at a nearby equestrian center. Our law enforcement sources say they got a call around 2 AM Monday morning for shots fired.

Witnesses told cops someone driving past the bash fired multiple shots -- however, once on the scene, cops found no victims and no evidence of the shooting.

The parking lot was crawling with cops who had to shut down the party while they investigated. We're told they have no suspects.

As you'd imagine, guests were on edge because the reported shots came so closely on the heels of Nipsey's shooting. YG -- who spoke at Nip's Staples Center memorial service -- paid tribute to his friend again during his Coachella gig.

'NSYNC already hit the stage with Ariana Grande, and that can only mean one thing ... Weekend 1 of Coachella is over ... but before you hang up your flower crowns and heart-shaped sunglasses, ya gotta see which celebs were in the crazy crowds.

Super hot model and DJ Chantel Jeffries peeled this orange number out, One Direction hunk Liam Payne gave getting ripped in the desert a whole new meaning and Victoria's Secret Angel Gizele Oliveira strapped herself into a slingsuit ... proving X truly marks the spot.

Check out Tommy Lee and Diddy hanging with their kids. Yup, Tommy and Brandon together. Halsey, Elsa Hosk, Larsa Pippen, Stella Maxwell, Winnie Harlow and 2 Chainz also got down.

Idris Elba -- aka DJ Big Driis -- showed off his turntable skills at Coachella Saturday night ... and people were definitely interested in witnessing it firsthand.

The British actor headlined a set during Day 2 of the festival, coming onstage under the Yuma tent around 9 PM in front of what appeared to be a packed house of spectators.

In this up-close footage, obtained by TMZ, you can see just how far back the crowd went, and just how into the music they were. We're told Idris mostly stuck to house music during his two-hour show. He didn't bring any special guests out as far as we know -- but he really didn't need to ... the crowd was all in on his vibe. And, besides, it's Idris-Freakin'-Elba.

It's funny -- Idris stars in a new Netflix film called "Turn Up Charlie," in which he plays a professional DJ-turned-nanny ... with hilarious results. Obviously, he was perfect for that role.

Coachella may have seen better days in years past, but a bunch of celebs still made the best of it.

Check out the photos ... Cindy Crawford, Emily Ratajkowski, Winnie Harlow, Olivia Culpo, Larsa Pippen, Kylie Jenner, Travis Scott, Brandi Cyrus, Bella Thorne, Willow Smith, Darren Criss, Cody Simpson, SZA, Stella Maxwell, Steph Shepherd, Sara Sampaio, Corinne Olympios ... enough for you.

Rivers Cuomo's iconic geek-chic look is still rockin'!

Here's a 30-year-old version of the Weezer frontman on stage at Coachella back in 2001 (left) and 18 years later ... the 48-year-old Buddy Holly look-alike on stage during weekend 1 of Coachella 2019 in his iconic black framed glasses (right).

Say it ain't soooo!

The question is ...

Leonardo DiCaprio is back in the desert for another year of Coachella -- and it looks like he's there with his latest boo thang ... who was apparently being a very good girl.

Leo was spotted late Friday night/early Saturday morning at the Poppy x Google Midnight Bloom after-party around 2:30 AM, where he was sporting his usual incognito getup ... a dark hoodie, a hat and sunglasses. It's really not even a disguise anymore, dude.

Anyway, the shindig drew a number of celebs ... we're told folks like Paris Hilton, Nick Young, Trae Young and even Cuba Gooding Jr. were there. And, of course, Leo and who we believe might be his 21-year-old Argentinian model (ex-?) flame, Camila Morrone.

In this video, obtained by TMZ, you see him stand up at one point and pet the girl who was sitting next to him ... right on the noggin. It's unclear if this is Camila, or some other chick he's cozied up with since ... but he's obviously comfortable enough to do a head pat.

Leo and Camila haven't been seen together in public since at least November of last year -- which seemed to cap off a whirlwind 2018 romance that also placed them at Coachella.

She got pretty handsy with him during a day party hosted by none than his former ex, Rihanna. And, the next day ... he returned the favor by clinging on to her for dear life.

Cardi B and Selena Gomez weren't the headliners Friday at Coachella, but you coulda fooled the crowd.

DJ Snake was performing on Day 1 and about an hour in Cardi B appeared followed by Selena.

BTW ... Selena hasn't performed for a year -- the last time we saw her onstage was when she joined Taylor Swift in May 2018 during her Reputation tour. Selena skipped Coachella last year. During the 2017 Festival, she made her relationship with The Weeknd public ... now her ex.

Cardi and Selena only performed one song -- "Taki Taki" ... the 2018 song they recorded with DJ Snake. Nevertheless, it was the highlight of the night.

A bunch of celebs soaked in the desert sun during day 1 of Coachella ... and this year's batch is super hot.

Check out Sara Sampaio, Brad Goreski, Arianny Celeste, Josie Canseco, Olivia Culpo, Jasmine Sanders, Elsa Hosk, Alexis Ren, Larsa Pippen, Kara Del Toro and Winnie Harlow.

The action during the day is at the hotels surrounding the Palm Springs area and private homes, where everyone hangs by the pool and shows off their bods.

Half the fun -- maybe more -- is outside the music venues ... by day and by night.

Jaden Smith was all about fam Friday at Coachella ... bringing out the Kardashian's current arch-enemy -- one Jordyn Woods.

The 20-year-old took the stage with a Tesla overhead ... suspended by chains. As for why ... Jaden has a long-standing relationship with Tesla's creator -- Elon Musk.

The car was lowered to the stage, and Jaden performed atop the whip.

Towards the beginning of his set, Jaden paid homage to Nipsey Hussle before bringing his sister, Willow, out on stage. She also performed, singing "Icon" along with her brother.

As for Jordyn ... she jumped on stage and danced around the Tesla. She wasn't there long, but she was clearly there to make a point ... Jaden and his fam support her. BTW, Jordyn was surrounded by security the entire time she was on stage.

After the performance, Jordyn was hanging with a guy ... we don't know who, but he was all over her.

These sizzlin' stars took time away from the tunes at Coachella to cool off by the pool ... dive into our gallery of celebrities who have shared plunge pics last year, to see who made a splash while in Indio!!!

Ariana Grande is getting an assist from her favorite boy band ... because we've learned 'NSYNC will definitely be joining her onstage at Coachella!!!

Our Coachella sources tell us 'NSYNC is planning something with Ariana onstage Sunday night during her headlining set ... the only question ... will the '90s heartthrobs sing, dance or do both?!?

Ariana's gotta be thrilled for the chance to finally share the spotlight with 'NSYNC ... she was raised on their music and recently posted an old vid of her in the crowd at an 'NSYNC concert, singing along in her mother's arms.

The surprise collab makes ya wonder ... will 'NSYNC help Ariana perform her hit song, "Break Up With Your Girlfriend?" The single from her new album samples an old 'NSYNC hit.

We've learned another important nugget, and it's gonna burst your bubble ... Justin Timberlake will NOT be involved.

Still, seeing AG on stage with Lance Bass, Joey Fatone, Chris Kirkpatrick and JC Chasez is totally epic!