Mp3Realm is an evolving search engine focused distinctively on audio in Mp3 format. Mp3Realm allows you to search for your favorite songs and clips, and filter them out by file duration. Your searches can be based on artist, title, genre or album. Mp3Realm also index’s lyrics, so you can sing along to your favorite songs.

http://mp3realm.org/

I’ve been spending wayyyy to much time on this site.