1OAK in LA

What we wouldn't give to have been there to see this!

Justin Bieber treated clubgoers to an impromptu performance of his hits "Sorry" and "What Do You Mean" at 1OAK in Hollywood on Saturday, and he enlisted the help of his pal Tyga to close out the show. The Biebs was really feelin' himself, and at one point asked the crowd if they ever thought they'd be Beliebers. We die!

T-Raww's girlfriend Kylie Jenner and JB's lady Hailey Baldwin were nowhere to be seen, and we gotta wonder how comfortable they feel with their men being surrounded by hundreds of scantily clad hoes all night?