Nancy Sandra Sinatra (born June 8, 1940) is an American singer and actress. She is the daughter of singer/actor Frank Sinatra, and remains known for her 1966 signature hit "These Boots Are Made for Walkin'" and her cover of Cher's "Bang Bang (My Baby Shot Me Down)" (lyrics and music by Sonny Bono), which was used as the opening sequence theme in Quentin Tarantino's Kill Bill.