Johnny Yen's One-Hit Wonders: "Master Jack," By Four Jacks and a Jill

Four Jacks and a Jill were a South African folk group who had had a hit in their native land. They hit the US Top Forty with their song "Master Jack" in 1968, reaching #18 on the Billboard Hot 100, and number 3 on the Adult Contemporary chart. It was an international 

smash, hitting the charts in Canada, Australia, New Zealand, Malaysia and Rhodesia (now Zimbabwe), and hit #1 in South Africa.

Their next song, "Mr. Nico," cracked the US Top 100, but they never charted in the U.S. They have continued to have hits in South Africa and have produced a number of educational and charity records there.