TBWAChiatDay was awarded the Grand Prize at the Effie Awards last night for its global ‘Silhouettes’ campaign for the Apple iPod, reports BrandRepublic. The advertising agency was awarded the Grand Effie for “Most Effective Campaign” for the popular iPod ads. “Our Grand Effie winner honors a product at the forefront of popular culture complemented by a creative, breakthrough marketing campaign that has proven to skyrocket sales,” said Mary Lee Keane, executive director of the New York Marketing Association.