Fans use small boats to chase after Justin Bieber in the harbor after his performance at the Norwegian Opera House on May 30, in Oslo, Norway.

Fans gather in the harbor prior to Justin Bieber's performance at the Norwegian Opera House on May 30, in Oslo.

Hordes of young fans gather by the Norwegian Opera waiting for Justin Bieber to hold a outdoor free concert on May 30.

Justin Bieber performs live at the Norwegian Opera House.

Justin Bieber fans gather at the Norwegian Opera House.