Nancy Sandra Sinatra (born June 8, 1940, in Jersey City, New Jersey) is an American singer and actress. She is the daughter of popular singer Frank Sinatra and his first wife, Nancy Barbato, and remains best known for her 1966 signature hit "These Boots Are Made for Walkin'".

For her fourth birthday, Phil Silvers and Jimmy Van Heusen wrote the song "Nancy (With the Laughing Face)", which her father recorded.

Nancy Sinatra began her career as a singer and actress in the early 1960s, but achieved success only in Europe and Japan. Then she had a transatlantic number-one pop hit with "These Boots Are Made for Walkin'", which showcased her provocative but good-natured style, and which popularized and made her synonymous with go-go boots. The tantalising promo clip featured a big-haired Sinatra and six shapely young women in tight tops, go-go boots and mini-skirts, and is considered a classic example of high camp. The song was written by Lee Hazlewood, who wrote and produced most of her hits and sang with her on several duets, including the critical and cult favorite "Some Velvet Morning". Between 1966 and 1967 alone, Sinatra charted with 13 titles, all of which featured Billy Strange as arranger and conductor. In 1967 she paired with her father for her second number-one single, "Somethin' Stupid". In 1968 she acted alongside Elvis Presley in the movie Speedway.

Nancy Sandra Sinatra Jr (born June 8, 1940, in Jersey City, New Jersey) is an American singer and actress. She is the daughter of the legendary singer Frank Sinatra and his first wife Nancy Barbato. Her career peaked in the late 1960s with a string of pop music hits. Her best-known hit, These Boots Are Made for Walkin’ - which popularized and made her synonymous with Go-Go boots - was written by Lee Hazlewood . These Boots… has been covered by many artists such as Geri Halliwell , Dave Musta