Tina Fey and her husband Jeff Richmond welcomed a new baby girl, Penelope, about five months ago and it sounds like the funny 30 Rock star is finally getting some sleep. She stopped by theLate Show With David Letterman last night to talk about her show's new season, what its like having two girls (her eldest, Alice, is 6-years-old), and how she tackles middle-of-the-night wakings. Check it out!