Hetty Blok en Bart Peeters - medley Ja zuster, nee zuster
1967 M'N OPA Hetty Blok & Leen Jongewaard
Leen Jongewaard en Hetty Blok - M'n Opa.
1968 Hans Boskamp & Hetty Blok - Stroei-voei
Henriëtte Adriana "Hetty" Blok was a Dutch cabaret artist, singer, and actress who performed on the stage, on radio, and on television for more than five decades. Her best-known role is Nurse Klivia, one of the lead roles in the iconic television series Ja zuster, nee zuster, a role with which she was identified the rest of her life. She was known also as a friend of Annie M. G. Schmidt and a singer of her songs.