The Grammy Award-winning singer announced a plan Wednesday to give a digital copy of her album \"Detours\" to the first 50,000 people who register three friends to vote.Crow\'s giveaway is a kickoff to Rock the Vote\'s voter registration drive. She is also offering a free download of her politically charged song \"Gasoline\" to anyone who logs onto the Rock the Vote Web site or anyone on the group\'s mailing list, said the organization\'s executive director Heather Smith.Read the entire Yahoo! news arti...