You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract After Letterman: CBS May Shake Up Late-Night More Than You Think Instead of a Youth Drive, How About Blowing Up the Format Completely? By Jeanine Poggi, Published on April 04, 2014 1 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.