david letterman tina fey sarah palin

4 Nov 2010 ... This impression just never gets old! LOLz! Tina Fey stopped by The Late Show 4 Nov 2010 ... Tina Fey brought back her Sarah Palin impersonation for a brief and wonderful 4 Nov 2010 ... It didny#39;t take much for David Letterman to coax a Sarah Palin impression out of 4 Nov 2010 ... Tina Fey did her Sarah Palin impression on �Late Show with David Letterman�