The Country Music Association announced that Jason Aldean will headline Nissan Stadium during the first night of CMA Fest on June 7. Jason joins Nissan Stadium headliners Carrie Underwood (June 8), Keith Urban (June 9) and Luke Bryan (June 10), as well as previously announced Nissan Stadium performers Kelsea Ballerini, Dierks Bentley, Brothers Osborne, Kane…