Yes. I knew a guy who was hearing music in his head all the time, he said it sounded like a radio playing in the background, and he told me it was diagnosed as induced psychosis. In his case, brought on by excessive substance abuse. I've read and heard other people say similar things. And I've read on mental health websites that sounds in the head, auditory hallucinations, voices, music, etc., can be related to psychosis. That's probably different though, to having a song stuck in your head from time to time, which is pretty common, sometimes annoying but not really problematic. And obviously I'm not a doctor but that's basically what I know.