I am a fan (and you should be too), because... Chris is hot! Lol!

Besides that he's got a great voice, he happens to do rock music (which I love) and his songs are awesome.
If I had to pick five favourites, they would be Sorry, There and Back Again, What I Want, Crashed (preferably the acoustic version - HOT!!), and It's Not Over. Oh, and Home sometimes makes me cry because I'm a long way away from it.