Justin Bieber Hangs Out with Pet Monkey

Justin Bieber's fans have earned a reputation on their own. The sound of young girls screaming at his concerts has been reportedly louder than a jet engine. The singer said one of the "craziest" fan moments was in Oslo, Norway in May 2012. "I was on a boat and basically we had an escort and there was hundreds of fan boats chasing me behind it. It was crazy," he recently told "Nightline." (Splash News)