That has actually happened to me... sucked. I have had nothing in my head today but what I've listened to and my head hurt all day so just turned the noise on an hour ago- listening to mostly common, krs1, talib...
For a while I've had 'Simpleman' by Lynyrd Skynyrd hanging about my thoughts. Did you know the correct word for a song that gets stuck in your head is called an ear worm?