One Hit Wonders: Your Best and Worst?

What do you think is the biggest one-hit-wonder of all time? And how do we judge this? Many moons ago I wrote a rant – masquerading as a poem or short story – that saw one character get into an argument with another because one was sure that Procol Harum’s A Whiter Shade Of Pale was the biggest one-hit-wonder of all time. And the other character argued …