Entertainment Weekly has a photo gallery of the twenty worst cover songs ever. They did not include the absolutely, positively, worst cover ever made. The worst one was an atrocious rendition of not one but two classic rock songs. You wouldn't think it possible to turn a Lynyrd Skynryd anthem and a Peter Frampton hit into elevator music, but Will to Power managed to do it.
Oh, and I should also mention that it is one of the top two or three worst videos ever made.
That's my opinion. What's yours? Feel free to leave a comment with your nomination for the worst cover song ever.
All in good fun, of course.