Pandora

This site has you choose any artist or song title, then matches up the closest matches to that specific kind of music, It's called a music genome project, that matching up process consists of how well the lyrics are written, the genre, type of instruments used, tempo, whether other users who put in the same information like the song etc. It's sponsored by iTunes so you actually listen to entire songs. Why I like this site: It introduced me to so much music I would've never found that is exactly the type I like. The only bad thing is..a few of the songs you hear are kind of difficult to find on records or pretty much anywhere. Be sure to visit: Pandora