VIDEO: MEAN GIRLS Writer Tina Fey Joins David Letterman On This Week's MY NEXT GUEST NEEDS NO INTRODUCTION
In a first look for Friday's premiere of My Next Guest Needs No Introduction with David Letterman, Tina Fey shows off her comedy chops in an off-the-cuff improv scene. Watch the preview below. In the interview, they also discuss her family, the SNL writers room, vaping and Fey's new Mean Girls musical, among other topics.