dont know about a whole song with bittersweet symphony as the beat, by try "Girl Talk". he samples many different genres of songs and mixes em up to have just a straight 45 min of music, at one point he uses bittersweet symphony for the beat to ying yang twin's "whisper song", pretty sweet. My favorite would have to be Pixie's "where is my mind" behind Puff daddy's "hate me now", or the song California behind Paul Wall's "sitten sideways". its straight gutter if your in to that sort of thing. search for him on myspace and check out the night ripper tracks for a good sample.