Hey Sueleen,
I hate to tell you, but the cut'n'paste Joni Mitchell show already exists. It's called "When All The Slaves Are Free" and it was created by Bryden Macdonald as something of a biography for Mitchell... it premiered here in Ottawa (Canada) last year.
Of course, it will likely never be seen anywhere else...
"There are only two tragedies in life: one is not getting what one wants, and the other is getting it." -Oscar Wilde