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2:01
Watch as Jimmy Heath, Willie Nelson, and Wynton Marsalis improvise.
1:43
Watch as Malcolm Jamal Warner talks about almost not being cast on "The Cosby Show."
3:51
Jack Johnson Performs at the Julia Louis-Dreyfus Mark Twain Prize.
1:14
Keegan-Michael Key Performs at the Julia Louis-Dreyfus Mark Twain Prize.
1:28
Performers of the 2013 Mark Twain Prize share their funniest moments with Carol Burnett.
3:14
Martin Short gives a toast to Carol Burnett at the 2013 Mark Twain Prize
