Singer Clark is a combination of two famous singers, Petula Clark and Roy Clark. Petula Clark is a British singer, songwriter, actress, and composer who has been active in the music industry since the 1940s. She is best known for her hit single 'Downtown' which topped the charts in 1964. Roy Clark is an American country music singer, songwriter, and multi-instrumentalist who has been active in the music industry since the 1950s. He is best known for his hit single 'Yesterday When I Was Young' which topped the charts in 1969.