The discussion thread of Devo's "(I can't Get No) Satisfaction" under the previous post got me thinking about the worst cover. Here goes:
Hands down, the worst cover ever is Mission U.K.'s "Tomorrow Never Knows."
And then there's a close second in Motley Crue's "Anarchy in the U.K."
Both are fucking godawful. Just try to listen to them all the way through...