--Mac Davis (guest host) - ""Somethin's Burnin'"" and a medley of current pop songs (""Best Disco in Town,"" ""I Love the Nightlife,"" ""Le Freak,"" ""Love to Love You Baby,"" ""D'Ya Think I'm Sexy,"" ""Don't Leave Me This Way,"" ""Dancin' Fool,"" ""Soul Man,"" ""I Love Music,"" ""Y.M.C.A.,"" ""Dance (Disco Heat)"" & ""Instant Replay"") --ABBA - ""Does Your Mother Know"" (music video) --Lisa Hartman - ""Hold On I'm Comin'"" & ""Oh Me Oh My"" --McFadden and Whitehead - ""Mr. Music"" & ""Ain't No Stoppin' Us Now"" --Bonnie Pointer - ""Heaven Must Have Sent You,"" ""Free Me from My Freedom"" & ""Aw Shoot"" --Gerry Rafferty - ""Days Gone Down"" (music video)