TOP 20 COUNTRY COUNTDOWDierks will be appearing as a special guest on this weekend's Top 20 Country Countdown, along with tourmates Brad Paisley and Jimmy Wayne. Catch the Top 20 Country Countdown on GAC at any of the following times:Friday at 8PM ESTSaturday at 10AM ESTSaturday at 5:30PM ESTSunday at 1PM ESTMonday at 10AM ESTClick HERE to read more.