 In the "Would You" number, Kathy Selden (Debbie Reynolds (I) (qv))  is dubbing the voice of Lina Lamont (Jean Hagen (qv)) because  Linas voice is shrill and screechy. However, its not Reynolds  whos really speaking, its Jean Hagen herself, who actually had a  beautiful deep, rich voice. So you have Jean Hagen dubbing Debbie  Reynolds dubbing Jean Hagen. And when Debbie is supposedly dubbing  Jeans singing of "Would You", the voice you hear singing actually  belongs to Betty Noyes (qv), who had a much richer singing voice  than Debbie.