Justin Bieber was a crazed fanatic during LAFC's championship game on Saturday ... completely losing it as his team came away with the thrilling win!!
LAFC ended up beating the Philadelphia Union in penalty kicks to secure the title ... and JB was clearly on pins and needles as the drama unfolded.
Bieber and his wife, Hailey, sat among the normies throughout the game ... and after the home team came away with the 'ship, Justin lifted her up in celebration.
Biebs even had his own custom LAFC jersey for the game .