4/5. Songwriter, producer and Robbie Williams collaborator Guy Chambers presents a detailed deconstruction of the "simple" three-minute pop song. This edition explores the chorus and vocal interpretation, with input from Fran Healy, Rufus Wainwright, Cathy Dennis, Beverley Knight, songwriter Desmond Child (Livin' la Vida Loca, Poison), and manager Simon Napier-Bell (the Yardbirds, Wham!).