Yes this happens to me alot too ..I get a song stuck in my head or part of a song ....I don't go out much these because if all going on so I think it might be a song I hear on TV from a show or movie ( not a song I listen to intentionally on radio or something ) but a song I have no idea where it came from
When I go shopping well when I used to ...sometimes after I'd get a song in my head I probably heard it in the store but don't remember actually hearing it
It's really kind of amazing how our minds work and pick out a song we may have heard and not noticed or even if we didn't just hear it a song just comes into our head perhaps because of how we feel or what's going on at the time
Stay Safe everyone