Justin Bieber's recent boozing on stage was a "one off", according to his pal.
Rapper Riff Raff believes the Where Are You Now? hitmaker, who hit the headlines this week for smoking marijuana and guzzling brandy on stage in New Zealand, is still committed to cleaning up his act.
Riff told TMZ.com that he recently hung out with Justin, 21, and producer Diplo in Hollywood, where he is recording his new album, and Justin didn't smoke marijuana or drink any alcohol while he and Diplo were "f****d up".
He also claims the trio later went to a party and Justin remained sober the entire evening.