Overview: Country-rock show: --The Marshall Tucker Band (guest hosts) - ""This Ol' Cowboy,"" ""In My Own Way"" & ""24 Hours at a Time"" --The Charlie Daniels Band - ""The South's Gonna Do It,"" ""Long Haired Country Boy"" & ""Caballo Diablo"" --Olivia Newton-John - ""Let Me Be There"" & ""If Not for You"" --Poco - ""Hoedown,"" ""Whatever Happened to Your Smile?"" ""Rocky Mountain Breakdown,"" ""Sagebush Serenade"" & ""High and Dry""