To promote a new wireless iTunes music service, Starbucks Corp. plans to give away 50 million free digital songs to customers in all of its US stores. Cards can be redeemed at Apple Inc.’s online iTunes Store, and will specifically be for artists signed to Starbucks’ Hear Music label.http://www.pressofatlanticcity.com/entertainment/music/story/7504054p-7401419c.html