We all know Justin Bieber has one of the largest and craziest fan bases in the world, and this fact was backed up by his latest stint in Norway, where he literally caused a state of emergency.
Norway officials were forced to take action after an overwhelming amount of fans appeared at Bieber's concert in the middle of town and even chased after his convoy.
Despite tweeting out to his fans to calm down and behave themselves, the Biebs was not successful and 49 girls were injured during his show.
It's awesome to have that many fans that adore you, but celebrities in general face this problem everyday, and unfortunately there is no easy solution.
This got us thinking of other big names that have overzealous fans, a few even had instances where a stan went nuts on them.
Check out the list on the following pages!