Palin makes surprise appearance on 'Tonight Show'

Sarah Palin signs her autograph at Barnes and Nobles during the first stop of her book tour in Grand Rapids, Mich. on Wednesday, Nov. 18, 2009. (AP Photo/Adam Bird) (AP)

December 11, 2009 7:45:45 PM PST
Sarah Palin made a surprise appearance on "The Tonight Show with Conan O'Brien" on Friday - and turned the tables on actor William Shatner.