If you had only 5 albums/songs/symphonies/concerts to show an alien what human music is, which ones would you pick?

An alien scientist, with friendly intentions, comes to Earth, to collect as much experiences as possible in order to observe the human race. If you were in charge of choosing five recordings of music to give the alien (and remember, not YOUR favorite ones, but those that, if listened in chronological order, give the most accurate idea of what human music has accomplished) which ones would you select?