Tina Fey announced that she is five months pregnant with her second child on Oprah's show this month, and now we're starting to get a good look at her pregnancy style. The 30 Rock star and April InStyle cover girl stopped by The Tonight Show With David Letterman in New York this week to promote her new book Bossypants wearing a form-fitting black jersey dress by Donna Karan. So far, so cute! Fey's appearance on the late night show will air Friday, April 15th. Her new book is available now for $26.99 on Amazon.com.