Interesting question (for which I don't have an answer) from an About Deafness visitor:
My father, who is 91 years of age, is completely deaf in his right ear and partially deaf in the left ear. For about one month, he has been hearing music in his right ear only...he says it is not music going through his mind, it is only in the right (deaf) ear. He tells us what song it is (sometimes the same song for several days) but it sometimes changes to another song. It is men singing in a low tone. One of the songs he hears a lot is "Maria" by Johnny Mathis. He tells us when the music slows down or speeds up. Have you ever heard of this? By the way, he is mentally stable and active and reads a lot. He told the hearing aid Dr. about this and was told to go to a regular Dr.
Related: Musical Ear Syndrome