I recall there were these two lame-o groups in the 80's that tried to do Zepplin covers!
One group I can't recall the name of did Black Dog. It was at most a "fair" version but they added horns!

Trombones I believe!
The other was a group called Far Corporation and they tried (as one magazine reviewer said)to "boogie-fy" the classic "Stairway To Heaven". I actually bought that song (long gone now)and boy,was it the worst thing I ever heard in my life!
Sythesizers,electric drums,multiple echo & bad singer!

I effectivly took it out later and "frisbee'd" it against a brick wall!
As far as the upcoming Grammy's,no doubt here,Usher is going to clean up! 4 #1's in 2004 from a CD that is nothing short of incredible. He's also now the #1 act of this young century! Sales,fans/concerts,the charts and just his overall talent. He's a shoo-in!

Later!
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"A knight of the road,going back to a place where he might get warm."

- Borderstone