Justin Bieber Attends Selena Gomez' Birthday Party

Justin Bieber sports a green letterman jacket as he arrives at Selena Gomez‘s 21st birthday party held at the Revolve Beach House on Saturday night (July 27) in Malibu, Calif.

The 19-year-old singer was joined by his good friends Jaden Smith and Ryan Butler. Teen Wolf actor Dylan O’Brien was also in attendance.

PHOTOS: Check out the latest pics of Selena Gomez

Earlier in the day, Selena was spotted walking to lunch with her mom Mandy and stepdad Brian at Kabuki in Encino.

FYI: Justin is wearing head-to-toe Saint Laurent.

10+ pictures inside of Justin Bieber, Jaden Smith, and more at Selena Gomez‘s party….