If you didn't catch Liv Warfield on Letterman, doing Blackbird, do yourself a favor, and do so immediately. 

Also finadable on Daily Motion, the youtubes, and elsewhere.   Really exhilarating.  I got blisters on my fingers.

Letterman can only mutter:  "Oh my god!  That was unbelievable."

Replacements
George Harrison
Metallica
Otis Redding
Tom Petty
James Brown
Sonic Youth
Prince
Neil Young
​Black Sabbath