Celebrities kicked off the music festival celebrations in Coachella Valley in California over the weekend, letting loose with good pals under the desert sun. Donning zebra-print pants, Jared Leto  chilled at the star-studded Neon Carnival event, and Kendall Jenner sported a huge nose ring  while hanging with her sister Kylie and their new best friend Selena Gomez  during daytime festivities. There was plenty of PDA, with Joe Jonas  and girlfriend Blanda Eggenschwiler kissing passionately and recently engaged Emma Roberts and Evan Peters sharing a smooch. As for big surprises, Beyoncé duetted with her sister, Solange Knowles , Justin Bieber randomly showed up to perform , and Hilary Duff hung out with Mike Comrie , from whom she separated in January. Keep reading to see the best photos so far, and come back later as the celebration continues!
Source: Getty , Billy Farrell Agency , FameFlynet , and Pacific Coast News Online 
Kendall Jenner wore quite a nose ring.
Austin Butler and Vanessa Hudgens  matched with their hats.
Sarah Hyland and boyfriend Matt Prokop stayed close.
Lea Michele  and Glee costar Mark Salling  hugged.
Emmy Rossum and Fergie  posed.
Kate Bosworth  and husband Michael Polish kissed.
Katy Perry  wrapped up in a tent.
Dianna Agron  and her rumored boyfriend, Thomas Cocquerel, kissed.
Justin Bieber surprised everyone with a performance.
Nina Dobrev  looked gorgeous.
Alexander Skarsgard  stepped out with a mystery woman.
Emma Roberts locked lips with her fiancé, Evan Peters.
Beyoncé joined her sister, Solange Knowles, for a surprise performance.
Jared Leto  rocked a colorful outfit with Davey Havok.
Jamie Chung and fiancé Bryan Greenberg looked good.
Miles Teller was the captain of the Neon Carnival.
Emmy Rossum looked festival-ready.
Danny Masterson and Kellan Lutz  held hands playfully.
Separated couple Hilary Duff  and Mike Comrie walked around together.
Fergie  hid under a big black hat.
Joe Jonas  kissed his girlfriend, Blanda Eggenschwiler.
Dianna Agron  danced the day away.
Vanessa Hudgens  covered up with a scarf.
Chord Overstreet sipped on a tropical drink.
Steven Tyler bit Katy Perry 's hat at the Lacoste party.
Selena Gomez  held Kylie Jenner's arm.
Lindsay Lohan  was in a jovial mood, flashing a peace sign.
Alessandra Ambrosio struck a pose.
Katy Perry  watched a performance.
Dianna Agron  and her rumored boyfriend, Thomas Cocquerel, got close.
Jared Leto  sported a thick beard.
Kendall Jenner bared her midriff.
Kendall and Kylie Jenner wore all black.
Cara Delevingne wore a patterned top to the festival.
Diddy  rocked a shirt with Biggie Smalls printed all over it.
Kelly Osbourne was all smiles.
Alessandra Ambrosio waved her hands in the air.
Rosie Huntington-Whiteley revealed her long stems.
Jared Leto  snapped a selfie.
Sarah Hyland shared a sweet moment with her boyfriend, Matt Prokop.
Kellan Lutz  showed off his guns while taking a selfie with Ashley Greene .
Shenae Grimes and her husband, Josh Beech, packed on the PDA.
Aaron Paul took his wife, Lauren Parsekian, to the event.
Katy Perry  rocked 3-D glasses at Alexander Wang's party.
Katy Perry  and Lea Michele  linked up.
Alexander Skarsgard  and Alexander Wang posed.
Ashley Benson played DJ.
Jamie Chung squirted a water gun.
Nicky and Paris Hilton  brought their sisterly love to the festival.
Joe Jonas  and Blanda Eggensschwiler held hands.
Kendall and Kylie Jenner clinked popsicles.
Riley Keough and boyfriend Ben Smith-Peterson went out at night.
Julianne Hough hit up the Old Navy Oasis.
Source: Michael Simon
Jared Leto  covered up.
Aaron Paul ran around and had a blast.
Lance Bass took a stroll with his shirtless  fiancé, Michael Turchin.
Emma Roberts and fiancé Evan Peters stayed close.
Kate Bosworth  struck a pose.
Kate Bosworth  and her husband, Michael Polish, got cozy.
David Hasselhoff made an appearance with girlfriend Hayley Roberts.
Brittany Snow  posed in denim.
Alessandra Ambrosio looked gorgeous.
Carmen Electra  had fun at Neon Carnival.
Ryan Phillippe  rocked a hankerchief.
Julianne Hough rocked a flower crown.
Hannah Simone rocked a hat.
Kylie Jenner, Selena Gomez , and Kendall Jenner stayed close.
Alessandra Ambrosio got her dance on.
Camilla Belle was all smiles.
Julianne Hough showed off her festival look with a friend.
Miles Teller snapped a selfie.
Hilary Duff  laughed while walking around.
Sarah Hyland and Matt Prokop stayed close.
Ashley Greene  walked hand in hand with boyfriend Paul Khoury.
Kellan Lutz  waved.
Jamie Chung sat poolside with Jesse Metcalfe and his fiancée, Cara Santana.
Emma Roberts had fun with chalk.
Amber Rose showed off her legs.
Aaron Paul had a big grin as the celebration started.
Ryan Kwanten looked dapper.
Dianna Agron  laughed while eating a popsicle.
Whitney Port  looked good in plaid.
Minnie Driver  was all smiles.
Aaron Paul got his dance on.
Kylie and Kendall Jenner had fun with Selena Gomez .
Michelle Pfeiffer  enjoyed the festival.
Katharine McPhee looked casual.
Kesha walked around the fest.
Rose McGowan snapped a selfie.
Ashley Madekwe rocked overalls.
Zoe Kravitz held hands with her boyfriend, Noah Becker.
Paul Wesley  laughed with a friend.
Kelly Osbourne hung out with friends.
Claire Holt struck a pose.
Katharine McPhee jumped around with friends.
Leonardo DiCaprio  hid, though he showed off his dancing skills at the festival.
Ireland Baldwin snapped a selfie.
Aaron Paul and Ashley Greene  ate Cousins Maine Lobster rolls at the Abbot + Main Estate pool party.
Source: Michael Kovac
Zoe Kravitz and her cousin, DJ Ruckus, met up at Nylon and Guess's Neon Carnival bash.