Paris Jackson celebrates 20th birthday with Paris Hilton, Ashlee Simpson and more stars -- see the pics

Happy birthday, Paris Jackson!

Michael Jackson's daughter turned 20 on Tuesday, and celebrated with a star-studded joint birthday party with her manager, Tom Hamilton, at HYDE Sunset in West Hollywood, California, on Friday.

A source tells ET that the restaurant side of the venue, which allows guests under 21 years old, was rented out from 9 p.m. to 2 a.m., and that the group did not go into the club, which opens at 11 p.m.

Jackson went '60s for the affair, sporting a floral dress, knee-high white go-go boots and fun sunglasses. While her rumored girlfriend, Cara Delevingne, wasn't spotted, the budding model was surrounded by friends and family, like her brother, Prince Jackson, as well as Chris Brown (who made sure he was close by when it came time to blowing out Jackson's candles).

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Jared Leto also popped in for the party, which was also attended by the Hilton family, including Kathy, Ricky, Paris and her fiance, Chris Zylka.

Ashlee Simpson Ross and Evan Ross posed for sweet pics together, while Ava Phillippe and Lee Daniels appeared to stay away from the camera.

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See more photos of Paris Jackson:


Paris Jackson Turns 20: Inside Her Grown-Up Life

Paris Jackson and Cara Delevingne Spotted Kissing After West Hollywood Dinner Date

Paris Jackson Wants Fans to Stop Editing Her Skin Color: 'I Am What I Am'