I use the term 'earwigs' with music to mean one thing.
An awful song that seems to get stuck in your head.
Yes, it is bad, but for some reason, you can't get it out of your head, or in even worse cases find yourself singing the lyrics!
Here is one that I know, it comes from a movie called 'Santa Claus conquers the Martians,' it is the theme song: Hooray for Santa Claus
Warning! this is a bad song that will get stuck in your head.