Justin Bieber Has Pants Pulled Down By Fan

(Radio.com) During a tour stop in Prague an overzealous fan grabbed Justin Bieber's pants and yanked them down as he walked to a vehicle with his security team.

Bieber launched his Purpose World Tour back in March and he has four more legs to go -- when it's all said and done, Bieber will have spent 15 months on the road.

That's a grueling schedule for anyone, much less a physical performer whose fans can't stop themselves from invading his personal space. Watch video of the incident here.