Cody Simpson turned the big 18-years-old on Sunday and naturally, he decided to have one legendary party to celebrate this milestone birthday. Guests at Cody's Coast House as the party was called included the singer's little sis Alli, his model girlfriend Gigi Hadid, Miley Cyrus and her new beau Patrick Schwarzenegger and Cody's longtime friend Justin Bieber.
Alli and Gigi wore some fabulous outfits to the party, with Alli choosing some bold, hot pink heels and Gigi going with a black crop-top number. Miley even got Cody a pizza themed cake, and we all know how much she loves pizza!
Click through the gallery to see some photos from Cody's party. Then tell us in the comments what you think about the party!