Ohrwurm

I was just telling someone in the office about the German work 'ohrwurm', or earworm, used to describe one of those annoying tunes that gets stuck in your head all day against your wishes. I checked it out on Wikepedia (to find out what the German word was), and discovered Maim That Tune, a service that offers alternative tunes that, whilst annoying in themselves, will drive the original earworm from your head...