--Helen Reddy (host) - ""I've Been Wanting You,"" ""Loneliness"" & ""I Am Woman"" --The Staple Singers - ""Let's Do It Again"" ""Respect Yourself"" ""Funky Love"" --Olivia Newton-John - ""Let It Shine"" & ""Lovers"" --Poco - ""Kep On Tryin',"" ""Sagebr