I did not go to prom so I have no idea what the theme was (I do know it was at the Pima Air and Space Museum)
but at my school we do have a senior class song, which is what the high school band plays during graduation and ours was Lost Prophets - "Rooftops"
"Fire has other worldly powers" -Lawdog1521
I don't remember my school having a senior class song, but I think that title just went in along with the senior prom thing.
"Punk rock should mean freedom, playing whatever you want,
As sloppy as you want as long as it's good and it has passion" Kurt Cobain