Does not contain preservatives – how long does a song stay “fresh”?

The apartment I currently live in has very thin walls. And when I say thin, I mean really thin. There used to be one huge apartment, but now there are two, and there is still a mere door behind one of the cupboards separating me from some college girls. I don’t usually pay attention to what music they are listening to. Probably because I am listening to music loud enough myself, so that I do not hear what they are listening. But one Saturday morning about a month ago I heard them play a song which awoke strong emotions in me. It was Radioactive by Imagine Dragons.