Childhood Memories

As I was driving home yesterday, out of nowhere I started to sing a song that we sang in the Singing Company (a childrens choir in The Salvation Army). This happens quite often that a song just pops into my head for no apparent reason. But yesterday this made quite an impact on me because I started thinking about whether the others who sang with me have this happen to them. Am I just thinking of them because of what I am doing with my life, or if I had left The Salvation Army, and God if I would still be singing these songs?