Happy Birthday Kylie Jenner!

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Kylie Jenner had a special 17th birthday on Sunday, complete with cupcakes, hats of her face and Justin Bieber singing!

The Keeping Up with the Kardashians star partied with pals, including Bieber, rapper Tyga, Chris Brown, The Game and sister Kendall Jenner.

Bieber wished her a happy day on his Instagram, writing: "Glad I got to spend it with u. So dope watching u grow up."

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Tyga also put up a shot of him and the birthday girl.

On Saturday night, the Jenner sisters celebrated with The Game and Brown. The Game, who was rumored to be dating Kylie's older sister Khloe Kardashian a while back, posted a moment with the hashtag: "#backyardboogie."

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The sweetest photo definitely came from Kylie's sister and partner-in-crime on Sunday. Kendall wrote: "Happy birthday to my teeny tiny baby sister @kyliejenner I love you!"