Clive Davis (guest host, record executive) --Blood, Sweat and Tears - ""You've Made Me So Very Happy"" & ""I Love You More Than You'll Ever Know"" --Melissa Manchester - ""Midnight Blue"" --Barry Manilow - ""Mandy"" --Barry Manilow and Martha Reeves - medley (including ""Dancing in the Streets"") --Janis Joplin (on film) - ""Try"" --Gil Scott-Heron - ""The Bottle"" & ""Must Be Something""