From Mashable.com:

Justin Bieber has teamed up with MTV and Facebook to take a stand against cyberbullying.

The teen star called for young people to post an action to MTV’s Draw Your Line, a virtual map and support forum that tracks efforts to stop digital abuse. To spur participation, Bieber is offering a chance to win one of 14 prizes just by posting an action. The contest lasts until March 31.

Read the whole story here.