While words and sounds can also pop into our head ... vigorously or you may find yourself chewing to the beat of your earworm.) And sometimes, having a song stuck on repeat isn’t a bad thing.

As I write this, I have a Bob Seger song stuck in my head. I despised it when it came ... of déjà vu can get really annoying. Read on to find out what an earworm is and—most important ...