I always have music in my head. My mother made her living playing the piano so my earliest memories are of music. The worst is when I get a song lodged in my head and it keeps going on "repeat". I've found that I can sometimes get rid of it by singing it through, start to finish, out loud. If that fails, I can always get rid of it by singing "If I only had a Brain" but then that just takes its place! LOL