Ok, I'll play, here's a few that come to mind:
Sweet Jane (VU) - The Cowboy Junkies
Can't Hardly Wait (Replacements) - Justin Townes Earle
Rebuild the Wall (Floyd) - Luther Wright & The Wrongs
Rebuild the Wall is a bluegrass cover of the ENTIRE Pink Floyd album The Wall done with full blessings of surviving members. Brilliant.