Some great suggestions so far. For instance, didn't realize "Black Magic Woman" was a F.Mac song. And bonehead move on my part getting Mayfield and Gay confused. Your ideas have sparked a couple more ideas:
Warren Zevon doing Dylan's "Knocking on Heaven's Door" on his last album (brings tears to your eyes)
Sara K doing "Brick House"
On the post 9/11 benefit concert some Rzeznik (is that the name?) and Limp Bizkit did an amazing "Wish You Were Here"
Yes, doing S&G's "America"
Of course, there's the punk cover of "Somewhere Over the Rainbow" -- is it the Sex Pistols?
Warren Zevon doing Dylan's "Knocking on Heaven's Door" on his last album (brings tears to your eyes)
Sara K doing "Brick House"
On the post 9/11 benefit concert some Rzeznik (is that the name?) and Limp Bizkit did an amazing "Wish You Were Here"
Yes, doing S&G's "America"
Of course, there's the punk cover of "Somewhere Over the Rainbow" -- is it the Sex Pistols?