Sarah Palin and Tina Fey: A Perfect Marriage

The third time is charming, in fact, as has been every appearance on "Saturday Night Live" by Tina Fey impersonating Republican vice presidential candidate and Alaska Governor Sarah Palin.

This one, of course, is on last week's debate between Palin and Democratic VP candidate, Sen. Joe Biden, with Queen Latifah also doing a perfect double-taking turn as moderator Gwen Ifill.

Whatever happens in the election, of the many impersonations on "SNL," Fey's of Palin is a classic, which started with a striking resemblance and has turned into a perfect union of characters.

Here is the first, with Fey and Amy Poehler as Sen. Hillary Clinton and Fey with Poehler playing CBS's Katie Couric.

Here's the new video: