Brad Paisely is an amazing musician, composer and performer, and on his recently released CD, 5th gear, is a song called Online.
Aside from a "damn" in the lyrics and a reference to having a 3-way CHAT, this is a fun song that could be used to start a serious discussion about online safety. In this instance, Brad sings about someone who is undertall and overweight and still lives with his parents, yet online he is 6 feet 5, rich, handsome, and lives in Hollywood. (I especially enjoy the marching band arrangement of the song at the very end of the track!)
A teacher could very easily play an excerpt of this song as a lesson starter.
Listen to "Online" by Brad Paisley : http://play.napster.com/track/20529550