Ask the gangsta rap devotee. Ask the grizzled blues fanatic and the bearded folk fan. Ask the goth and the indie kid. Ask and they will all tell you the same thing: death and popular music have forever danced hand-in-hand in funereal waltz time. The pop charts and the majority of radio stations' playlists may conspire to convince anyone listening that the world spins on its axis to the tune of "I love you, you love me" and traditional matters of...