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 Behold (and Fear!) the Awesome Social-Media Power of Justin Bieber Beliebers! Dumenco's Trendrr Chart of the Week + BREAKING NEWS: Bieber's Manager Arrested Over Tweets! By Simon Dumenco, Published on March 24, 2010 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.