Mahler's 3rd. Not one of my favourites, but it is 1.5 hours long, so you would only have to listen to it 16 times.

(OK, I know I am cheating - its supposed to be a song, not a symphony).
I don't know what song I would choose, but I do know that it will not be Celine Dions "heart will go on" song from the Titanic.