Justin Bieber Performs at Floyd Mayweather’s Birthday Party

Justin Bieber helped Floyd Mayweather celebrate his 40th birthday in Los Angeles last night, February 25. Justin was one of the many stars who took the stage during the party to serenade the boxer.

Before heading to the party, Justin was spotted at the Diamond Supply Co. x We Know the DJ pop-up shop in Hollywood. You can see a photo of him at the pop-up shop here.