Forgot one which has to be the most over-rated cover I know. It is horribly over-rated.
Hurt by Johnny Cash (orignal by NIN (Nine Inch Nails) ).
I first heard the orignal in a flash movie that featured on the front page. The same day I got the song (LEGAL WAYS OF COURSE!). I then heard of an acoustic version that was done by Johnny Cash. Since the song was crying out to be done on acoustic guitar, I couldn't wait to hear it.
As soon as Johnny Cash struggled out the first line, my heart just dropped. He murdered the song with his voice. His voice was so old, worn and it struggled so much, it broke the song in thousands of peices. But for some weird reason, loads of people love the cover and consider it better than the orignal. I really can't agree.