Nancy Sinatra is an American singer and actress and the daughter of Frank Sinatra. She began her career with an appearance on her father's tv variety series in 1957, but initially only achieved success in Europe and Japan. In early 1966 she had a transatlantic number-one with "These Boots Are Made for Walkin" which was written by Lee Hazlewood, who wrote and produced most of her hits and sang with her on several duets (the Nancy and Lee album is a personal favourite of mine). Her relationship with Hazlewood was something of a love/hate one with Nancy quoted as saying "..we had a love-hate relationship but we made wonderful music together. In the end, it was more love than hate.".
Nancy had a brief acting career in the mid 1960s which included a co-starring role with Elvis Presley in the movie Speedway. She still tours regularly and releases albums.
Source: The Telegraph