Country Thunder USA has announced Tim McGraw, Alan Jackson, Montgomery Gentry, Little Big Town and Blake Shelton among the headliners for the Arizona Festival taking place April 1 - 4.  Country Thunder will be offering a "layaway" plan for ticket purchasers, who can either pay the total ticket price at once or over 3 months.  Four-day passes cost $99 and can be purchased here.  The festival is held at Canyon Moon Ranch in Florence, AZ.