Lee Hazlewood was an American country and pop singer, songwriter, and record producer, most widely known for his work with guitarist Duane Eddy during the late 1950s and singer Nancy Sinatra in the 1960s. Hazlewood had a distinctive baritone voice that added a resonance to his music. Nancy Sandra Sinatra is an American singer and actress. She is best known for her 1966 signature hit "These Boots Are Made for Walkin'".(Source: Wikipedia)