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 Bob Dylan Shills for Cadillac Move Over, Rappers. Folk Legend Pimps This Ride By Ken Wheaton, Published on October 22, 2007 19 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.