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Harry Styles Celebrates 21st Birthday With Jennifer Lawrence, Chris Martin, Kendall Jenner, and More Celebs!

Harry Styles
Harry Styles celebrated his 21st birthday with a bevy of his A-list friends.

Officially legal — and possibly host of the most celeb-attended party of the year! Harry Styles rang in his 21st birthday with a bevy of celebs on Saturday, Jan. 31, at soon-to-be opened Los Angeles hotspot Isabel.

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On the extremely tight guest list? Chris Martin, Jennifer Lawrence, Adele, David Beckham, Cindy Crawford, Courteney Cox, Adam Levine, Zach Braff, Kendall Jenner, Kelly Osbourne, Cara Delevingne, Rashida Jones, and more of the One Direction hunk’s closest and very famous pals — including his latest fling, Victoria’s Secret model Nadine Leopold.

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According to one source, the birthday boy was feted with four cakes, each of them adorned with his lusted-after mug. Partygoer Rita Ora shared a picture of one of the cakes, which was clad with a young Styles on it. “One of his cakes @harrystyles #lastnight #birthdayboy #happybirthday,” Ora shared on Instagram the following day. 

One of his cakes @harrystyles ????#lastnight #birthdayboy #happybirthday

Uma foto publicada por Rita Ora (@ritaora) em Fev 1, 2015 às 6:54 PST

While Styles was busy running around greeting guests, J.Law and Martin were enjoying their time together. “Jen and Chris weren’t overly affectionate but they were definitely spending time together,” a second source tells Us of the couple, who sat with Adele for a majority of the night. “Chris was ever the gentleman and would get drinks for Jen whenever she needed a refill and sweetly brought her a slice of cake when they were served,” the insider adds.

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Styles, for his part, was a great date as well. Another source tells Us his supermodel fling “brought a bunch of her hot girlfriends” with her to the bash, and she “mostly let Harry have his space.” The insider says that Styles wouldn’t stay away from the gorgeous blonde for too long, however. “He ended the night with her,” the source tells Us. “He would run over to her and her friends and they'd get all excited and really wanted to make sure he was having fun.”

After the crowd celebrated Styles with the birthday cakes, the Brit even managed to include his mum Anne in on the celebration. “He FaceTimed his mom during the party,” the source tells Us. “He swung his phone around the room so she could see the party.”

At one point, even Florence Welch tried to attend the bash, but was rejected at the door by security. 

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Soon-to-be second-time parents Donald Faison and CaCee Cobb also attended the bash, where they seemed to be “enjoying their parents’ night out.” 

Kelly Osbourne also had a blast. The Fashion Police co-host shared a photo of a photo booth photo session with Styles, Delevingne, and Jones on Instagram on Sunday with the caption: “Last night was so much fun!!! #HappyBirthday @harrystyles ????.”

Last night was so much fun!!! #HappyBirthday @harrystyles ????

Een foto die is geplaatst door Kelly Osbourne (@kellyosbourne) op 1 Feb 2015 om 12:33 PST

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Following the soiree, Jenner, Delevingne, and Ora headed to new karaoke hotspot Blind Dragon, where they sang and partied until 3 a.m.

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