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 Why Starbucks' Logo Change Doesn't Equate to Brand Change The Siren Is Evolving to Support a New Growth Agenda, and Rightly So By Carl Johnson, Published on January 19, 2011 13 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. Register Now Already a member? Log in.