Country superstars Carrie Underwood and Brad Paisley will co-host the upcoming Country Music Association Awards for the fourth staright year, organizers announced Monday.  The 45th Annual edition of the awards ceremony is scheduled to take place November 9th at the Bridgestone Arena in Nashville, Tennessee, and will be broadcast live on NBC.  Between them, Paisley and Underwood have won 19 CMAs during their careers, and Paisley is the reigning CMA entertainer of the year.