Even stars as famous as Justin Bieber have embarrassing moments. 

Falls, bad photos, anti-fans, and rumors.....all of this and more Justin has had to put up with. 

But now Justin has been caught on film with his pants down! He was in the middle of the show when all of a sudden his pants started to fall off. It all happens at once at minute 1.33 on the video. 

Video sent in by Mónica Jamieson.