Fleetwood Mac's 'Oh, Daddy' on Legacy, the Rumours tribute album. Don't remember who did it.

I'll throw in another one:

Cracker's cover of "Loser" by the Grateful Dead

I never knew Loser was a cover song. Huh. Learn something enw every day

I've only had achance to look at about half these so if it's already been said sorry. Tool did a live cover of Ozzy's Diary of a Madman & The Cure's Love Song mixed together

If one goes by the number of times it has been covered, "Louis Louis" must rank near the top.

When I was in college, the campus radio station had a "Louis Louis" contest. They received hundreds of garage band covers of the song - and played them all. The range of styles and quality was very entertaining.

According to The Covers Project, the winner is the Bo Diddley song "Who Do You Love", with 171 versions. "Louie Louie" has a paltry 73 versions. Of course, this list doesn't include bar bands.

As I have heard 300+ on the campus radio program, Louis Louis is my personal "most covered and listened to" song - but the Bo Diddley tune is a terrific one as well.

Thorogood had quite a few but my favorite would be, Van Halen's cover of the KINKS song "You Really Got Me"..... Eddie's guitar on that puts Dave to shame, and since it is later and censorship wasn't as bad, DLR's sexual overtones that Ray couldn't have on the original were cool.

I thought "Yesterday" by the Beatles was the most covered song ever?

That site gives 86 versions of Yesterday. I'm not saying that the site is definitive, but that's my source.

Johnny Cash - Hurt
Kenny Wayne Shephard - Voodoo Child
Type O Negative - Cinnamon Girl
Sisters of Mercy - Gimmie Shelter
Stevie Ray Vaughan - Little Wing

Pennywise - Stand By Me
Pennywise - Brown Eyed Girl
Driopkick Murphys - Fortunate Son
Dropkick Murphys - Dirty Water
Limp Bizkit - Faith
Fuel - Going To California
Aerosmith - Come Together
Van Halen - You Really Got Me
Dangerous Toys - Feel Like Making Love
Pantera - Cat Scratch Fever

I can't believe no one mentioned Staind's cover of "Black" (originally by Pearl Jam.)
That's an awesome awesome cover, I like Aaron singing it better than Eddie!