Turns out the song he was listening to was Cyberbird from Ghost in the Shell: Stand-Alone Complex (2002). I listened for a little bit and I was pretty freaking astounded. This was exactly like Battersea, from Blue Wonder Power Milk (1998). It had the same instruments, same tempo, same drum beat, same key, same kind of singing... so after I listened to THAT SONG, I connected to my library through iTunes and played Battersea. Everyone was like "you are totally playing the same song Jeffrey you must be joking."
But man. I mean, the songs are different enough... but in terms of style, Yoko Kanno's got some serious steeeeeaaaaling going on. Take a look for yourself:
edit I was totally beaten by a lot.