What is one song that has changed your life?

Wow. Tough question...there's so many great songs out there. I don't know if any songs have actually changed my *life* but there are songs that I associate with big changes in my life - that is to say, they're tied into and connected to my memories. And in that case, believe it or not, it would probably be "What Kind of Pokemon are You?" from one of the Pokemon soundtracks, because I was listening to it when I was in the car with my sister and her first boyfriend. That's when I realized that she was in love and I was going to have to let her go soon. I did have to. But it turned out excellently (: