Coachella

Billie Eilish is leaning into the fact that she's into girls -- planting a kiss on a female YouTuber at Coachella ... and smacking the gal's ass while she's at it.

The singer was filmed at the music fest this weekend, where she smooched with Quenlin Blackwell -- a Gen Z content creator who's been hanging out with BE a lot lately ... and with whom she's sparking romance rumors after this PDA moment.

Watch ... Billie could be seen grabbing Quenlin's face and pulling her in for a kiss while enjoying music at the festival. It wasn't super show-y or anything ... still, a kiss is a kiss.

Will Smith made a rare appearance onstage this weekend -- crashing Coachella to perform a song from the '90s ... and doing it alongside none other than J Balvin.

Indeed ... very random, but no less entertaining. Balvin had an alien-themed design and aesthetic for his Coachella gig ... and at one point in the set, he brought out WS who was rocking his signature 'MIB' 'fit ... only to rap the "Men in Black" song from the titular movie.

The crowd loved it ... including Jada Pinkett Smith, J's girlfriend, Valentina Ferrer, and BLACKPINK sensation Lisa who were seen dancing together in the artist pit. Will's performance is getting rave reviews too, 'cause people could clearly hear his vocals as opposed to a backing track.

Stars dug deep and mustered up the courage to brave the final day of the Coachella Music and Arts Festival ... and it looks like they didn't have a problem peeling their party pants off the floor for one last day of craziness!

Ke$ha continued her tee shirt trend and got the crowd going when she joined Renee Rapp on stage and changed the lyrics to her jam 'Tik Tok' to 'Wake up in the morning like f*** P. Diddy!'

Shaun White started his sunday shirtless hanging poolside and making a little music of his own alongside his partner Nina Dobrev ... and Stassie Karanikolaou kept it classy in a white knit top and a pair of cream lowriding cargo pants.

Doja Cat turned into a chameleon at Coachella Sunday night, wearing a hodgepodge of different outfits that dazzled the crowd during her wild performance.

The rapper hit the stage at the 23rd annual festival in Indio, California to close out weekend 1 – while singing many of her popular tunes and constantly changing her racy wardrobe.

Check out these photos of Doja's various clothing choices throughout her set. First, she decked herself out in a baggie white coverall with a flowing blond wig.

Taylor Swift and Travis Kelce were big time power-coupling at Coachella -- and had some other lovebirds tagging along to make it a big old group outing ... no third wheels allowed.

The pop star was out in force Saturday night in the desert -- and she had her BF by her side ... not to mention a newish-looking squad, including other couples ...  Justin and Hailey Bieber were in the mix -- as were Sabrina Carpenter and Barry Keoghan (SaBrarry?)

They were all leaving what looked to be the backstage area from Ice Spice's set -- where we'd seen them earlier -- and the whole crew trickled out almost in single-file line fashion.

Justin Bieber and Jaden Smith are still friends after all these years ... with Jaden grippin' Justin in a big hug and gettin' a smooch in return during Coachella.

The two music superstars met up Saturday during the music festival's busy first weekend ... and, JS decided to surprise his best bro by embracing him from behind.

Check out the clip ... Bieber's face lights up when he looks back and sees it's Jaden who decides to move around and go for a real embrace from JB in a VIP area at the festival.

Kesha's on the crap-on-Diddy train right now amid his legal woes -- changing some famous lyrics at Coachella to send a message ... namely, I don't mess with you anymore, Puffy!

The singer appeared as Renee Rapp's special guest Sunday during the music festival -- and sure enough, she sang her biggest hit 'Tik Tok' ... which starts out by name-dropping Diddy, but which she switched up in emphatic terms as she took the stage.

Instead of singing, "Wake up in the morning, feeling like P. Diddy" ... Kesha sang, "Wake up in the morning like f*** P. Diddy" -- and Renee was right there with her to sing it loud too.

Grimes' Coachella performance didn't go as planned ... plagued by constant stoppages she blamed on technical difficulties -- before she let off several frustrated shrieks.

The singer-songwriter took the stage on Saturday night out in Indio, CA, presumably ready to bring the house down ... though ultimately she couldn't keep the music up.

Check out the clip ... Grmies' show on the Sahara Stage is moving along just fine before an incorrectly timed transition throws the musician into a bit of a tailspin.

Taylor Swift and Travis Kelce decided to do a kissing tour of Coachella ... with the pair smoochin' in the middle of the crowd this time.

TMZ has obtained exclusive photos of this new passionate PDA session ... and, it's as clear as day -- these two lovebirds are absolutely crazy for one another!!!

Check out the pics ... Taylor and Travis are pretty out in the open here, fully invested in one another's lips -- without a care in the world as far as we can see.

Gwen Stefani y los chicos No Doubt incendiaron Coachella anoche... regresan juntos al escenario por primera vez en casi una década.

Gwen, el bajista Tony Kanal, el guitarrista Tom Dumont y el baterista Adrian Young se adueñaron del escenario de anoche, ofreciendo un set nostálgico y lleno de energía… realizando su primer concierto juntos en -- como Stefani misma lo expresó -- "¡nueve j*didos años!"

La banda tocó un set de 80 minutos cuyos fans disfrutaron al máximo... calificando el reencuentro como “icónica” y “una de las mejores actuaciones del año” en redes sociales.

Taylor Swift and Travis Kelce couldn't keep their hands to themselves Saturday night ... lockin' lips at Neon Carnival after engaging in some backstage PDA.

Video from inside Neon Carnival -- an invite-only rager sponsored by Liquid IV, Patron El Alto and Levi's -- shows the power couple immersed in their own little world, lips securely locked to one another.

Looks like they've both got drinks in hand at the mega-exclusive event ... though they're far more focused on using their mouths in a different way to take a swig.

Coachella's first weekend's still ragin', but some celebs chose to stay closer to home ... picking tuxedos and champagne instead of hard partyin' in the desert.

The 10th annual Breakthrough Prize Honors -- known in some circles as "The Oscars of Science" -- took place at the Academy Museum of Motion Pictures Saturday night and many of Hollywood's more "serious" stars stuck around for the festivities.

Kim Kardashian and her mom Kris Jenner took centerstage, of course ... wearing off-setting black and white ensembles while Elon Musk and Bradley Cooper kept it simple in traditional tuxes.

El viento aullaba por los campos de polo de Indio en el segundo día del festival de música y artes del Valle de Coachella y los grandes nombres del desierto se enfrentaron a vendavales y se adentraron en lo desconocido.

El día 2 trajo consigo grandes fiestas y actuaciones... ¡y Hollywood respondió a esa energía con sus propios looks! Teyana Taylor llevó la antorcha de los vaquero con un sombrero/bandana de la época de Bret Michaels y un caftán plateado transparente.

Lukas Gage lo mantuvo casual... pero de alguna manera le dio un toque de fraternidad a su look de moda festivalera... y Olivia Culpo hizo su peregrinación anual a las tierras sagradas de Hollywood con un sencillo vestido blanco para impulsar las plur vibes.

La fiesta posterior MÁS GRANDE del fin de semana, Neon Carnival, atrajo a todos los nombres más importantes del desierto... Ke$ha estaba armando un infierno mientras lucía con una camiseta vintage y un par de botas de vaquero clásicas. Amber Rose mostró sus curvas alrededor de la fiesta de Brent Bolthouse con un body verde... mientras que Paris Hilton continuó "viviendo en el desierto" con un jersey negro y algunos accesorios de cadenas cromadas.

Taylor Swift y Travis Kelce aparecieron por sorpresa en Coachella el sábado por la noche… acogidos por el backstage, mostraron su apoyo a los colaboradores de Tay.

La pareja fue vista detrás del escenario, abrazándose y bailando mientras tocaba la banda de su amigo Jack Antonoff, Bleachers.

Taylor también mostró apoyo a su colaboradora en “Karma”, Ice Spice, durante su set.

Taylor Swift and Travis Kelce made a surprise appearance at Coachella Saturday night ... getting cozy backstage while showing support for Tay's Collaborators.

The couple was spotted backstage hugging and dancing while friend Jack Antonoff's band Bleachers performed.

Traylor also showed support for Tay's "Karma" collaborator Ice Spice during her Coachella performance.

Gwen Stefani and the men of No Doubt set Coachella ablaze last night ... returning to the stage together for the first time in nearly a decade.

Gwen, bassist Tony Kanal, guitarist Tom Dumont and drummer Adrian Young took the stage last night, playing a nostalgic and high-energy set ... performing their first gig together in -- as Stefani herself put it -- "nine f***ing years!"

The band performed an 80-minute set and fans ate it up ... calling the reunion "iconic" and "one of the best performances of the year" on social media.