I would remove the statement that it's addictive. Even if it is, let people come to that conclusion themselves. You can't force it to become viral - it just needs to be easy enough so it can become viral.

Once you have it as easy as possible, send it to all your friends - or better yet, use it to describe all your friends with a song... If it peaks their interest they will play with it and send it on to their friends. That's how it will grow viraly.