I've been listening to Avril Lavigne's "Slipped Away" song for almost a half an hour already. I find it really depressing. In fact the first time I heard it (few years back then), I felt like I wanted to kill myself because of an eeriee melancholy that I felt. According to what I have read (I can't remember what site it is, though), this song is meant for her grandfather. As I remember, her grandpa died during her concert, or show or something...
Just sharing :)