"Somethin' Stupid" is a song written by C. Carson Parks and originally recorded in 1966 by Parks and his wife Gaile Foote, as "Carson and Gaile". The most successful and best known version of the song was issued by Frank and Nancy Sinatra on Frank's album The World We Knew. Frank Sinatra played Parks' recording to his daughter Nancy's producer, Lee Hazlewood. Their rendition was recorded on February 1, 1967. The song spent four weeks at #1 on the US Billboard Hot 100 chart and nine weeks atop the adult contemporary chart, becoming Mr. Sinatra's second gold single as certified by the RIAA and Ms. Sinatra's third. It was the first and only instance of a father-daughter number-one song in America. The single also reached #1 on the UK Singles Chart the same year.