One Direction Harry Styles's 21st Birthday [PICS]: Jennifer Lawrence, Chris Martin, Kendall Jenner, Adam Levine and More Attend 1D's Birthday Bash

Leave it to Harry Styles to put us to shame. The One Direction singer turned 21 in the best way possible over the weekend, surrounded by some of the biggest names in the world. While we loved everything about turning the legal drinking age, we're just bitter that Harry got to have Jennifer Lawrence, Chris Martin, Kendall Jenner and Adam Levine at his bash. It's not just the guest list that was top-notch, but also the fact that Styles got to have the party at a yet-to-be-opened Hollywood locale.

According to E! News, the birthday extravaganza was held at Isabel's, which is set to be opened to the public later this week.

And it wouldn't be a Hollywood party without an off-the-hook guest list right? Well, had you been lucky enough to get an invite to this A-list event, you would have been able to brush shoulders with some of L.A.'s elite. In addition to Lawrence, Martin and Levine, Adele, Kelly Osbourne and Cara Delevingne were also in attendance.

It seems that there is no bad blood between Cara, Kendall or Harry, even though the singer famously dated both models last year. The three looked really chummy with one another as they celebrated the singer's birthday.

Celebrity guest Rita Ora, who was also present for the festivities, took to her Instagram account to post a picture of the adorable birthday cake with a throwback picture of Styles screen-printed on top of the frosting.

A photo posted by Rita Ora (@ritaora) on Feb 1, 2015 at 6:54pm PST

Kelly Osbourne also looks like she had a blast at the party, as she took to the photo booth to get goofy with Styles, Delevingne and Parks and Recreation actress Rashida Jones.

A photo posted by Kelly Osbourne (@kellyosbourne) on Feb 1, 2015 at 12:33pm PST

Happy belated birthday, Harry! Hope we're on the guest list for next year.