During her 7:40 minute routine, Fey made some jokes about the former McCain vice-presidential candidate's best-selling book, "Going Rogue," and then said (at around 2:40 in the video below), "Mrs. Palin and I continue to have so much in common. They recently made a porn movie... this is true... about Sarah Palin and then this same adult actress, Lisa Ann, played me in a porn parody of '30 Rock' ...Weirdly, of the three of us, Lisa Ann knows the most about foreign policy."
Fey saved her brief impersonation for the end of her time on stage, starting out in her own voice, "We'll begin with an issue that is," and then in her Palin voice "so critical to the future opportunity."
The audience laughed, and she said, "I'm gonna be doing that 'till I'm dead."
More Coverage of Sarah Palin:
DNC: Sarah Palin is "Dangerous"
Rules Differ for Palin at Military Bases
McCain Aide Nicolle Wallace: Sarah Palin's Claims are "Fiction"
Hundreds Line Up for Palin Book Signing
Fact Checking Sarah Palin's "Going Rogue"
Marc Ambinder: Palin Needs to Take Herself Seriously
CBS News Poll: Fewer Than 1 in 4 Have Favorable View of Palin
Is Palin Selling Books or Settling Scores?
Exclusive: Palin Accounts Disputed by McCain Aides
Fact Check: Palin Seems to Misrepresent Timeline on Daughter's Pregnancy
Fact Check: Palin Contradicts Her Own Version Of Events With Oprah
Daniel Farber is editor-in-chief of CBSNews.com.