last song syndrome: what is the last song in your mind?

Erghhh.. Well, I have been singing my LSS now for I think a week now. I don't know why I keep singing this song. It just pops out of my mind all the time. And it goes like this.. " papa ra papa.. love ko to...".. it's actually mcdonald's theme here in our country.. Hehehe. I just keep singing the same line over and over.. it's making me crazy.