Kenny Chesney and John Mellencamp will unite for a taping of CMT Crossroads on Aug. 6 in Nashville for an invitation-only crowd. The episode is scheduled to air Oct. 3. Past pairings on CMT Crossroads include Lucinda Williams and Elvis Costello, Hank Williams Jr. and Kid Rock, Brooks & Dunn and ZZ Top, Elton John and Ryan Adams, Willie Nelson and Sheryl Crow, the Dixie Chicks and James Taylor, and Travis Tritt and Ray Charles. 07/21/03