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 LeBron and Serena Help Nike Celebrate 25 Years of the 'Just Do It' Tagline Bradley Cooper Narrates Energetic Spot Encouraging Everyday Athletes to Strive for More , Published on August 21, 2013 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.