What song has affected your life the most? im trying to make a great playlist.?

Airborne toxic events song sometime around midnight really got to me after i read this thing from this army guy in youtube about this girl he said he loved from kindergarden or something like that. She pretty much said no and that really sucks and this guy responded back to him by saying its just how life is. My question is their a song that affected your life the most in any type of way? im really trying to get great music out of this thanks everybody. ::)