Thanks for all the information on this. I guess I just never talked to anyone else about the problem. I see it is much more common than I thought. I find I am particularly open to this to a song that I hear in the morning;also that if a new song starts an earworm in me,it ends up a hit. I have a persistent one from 1968 from a song a friend wrote;I should have kept in touch with him to get the words.This song still makes me happy and bouncy. His songs were so good I thought he would go commercial with them somehow.