Agreed, this was going to be my answer.
Wow was that bad! Makes me think even I could be a rock star!
English Beat - "Tears of a Clown"
You can keep your hat onJoe Cocker - With a little help from my friends
Courts ruled not a coverThis is by far the best, most popular, and most successful cover song ever.
COVER
ORIGINAL
Johnny Cash. Hurt.
My list (2 already mentioned):Back in the late 1980s. Guns n Roses did a cover of "Knockin on heavens door". The Bob Dylan version of this came on the radio, and the younger girl working next to me says "who's the guy with the whiny voice doing the GNR song".
SMH
Musical tastes are a funny thing. I consider that the worst cover of all time. Essentially the same song with, “One time.....two times” thrown in and a far inferior singing voice.