Song on my mind

For the past week I have woken up every morning and found myslef singing the same song in my head. I havent heard the song for a while so its not like have heard it and am now repeating it. It has just been on my mind for the past few days. Its the wierdest thing. I don't think about it at all, or hear it anywhere, however when I am in the shower, I find myself singing it in my head. And I cant get it out of my head. No matter how many times I sing it out loud.

And the song I keep on singing in my head......