It's like a radio in my head that WON"T SHUT UP!

For the past few months, when I'm up like 40 times during the night, I've had song lyrics going over and over in my head. Normally, when I wake up at night, I end up thinking about things. Not lately. It's been all songs. Over and over and over. It tends to be the same song for the whole night too. And I'm up a lot, which explains why it's repeating sooooo many times. Let me tell you--it's really annoying!