Said by anyone else, this nicety is unremarkable. In a black zip-up sweater, black track pants and a graying, tousled pompadour, he climbed to the top floor of his barn-like art studio, constructed by Amish builders two decades ago, and cracked a 7.5-ounce can of Coca-Cola. On a breezy Sunday afternoon in May - a day off from his Live and in Person tour - John Mellencamp descended the golf cart he uses to navigate his expansive, sylvan estate in Bloomington, Ind.
