I always have at least one song stuck in my head. Sometimes multiples. And it's snips of songs, not whole ones. And like 1 line will play from one then 1 line from the other, in a loop. And sometimes it will be 1 song. But when I get songs stuck in my head they usually last for weeks to months. Same song, over and over, all day and every day. I had the "Clap along if you feel that happiness is the truth" stuck in my head for three months. Just that one line, from the Happy song.

And I'm trying to go to sleep but the song keeps looping. And the song will bring up memories, make me think of things I don't want to think of, and those things will build up.