On Monday night Anna Wintour will “ad-lib it” when she appears on the Late Show with David Letterman. A Condé Nast spokesman said, “She’s done plenty of live TV before.” (On Mars?) A source told “Page Six” that Anna’s “been practicing hard” and was advised not to wear sunglasses, which “she didn’t appreciate.” But Condé says that’s untrue. [Page Six/NYP]
