Nancy Sinatra is an American singer and actress famous for her distinctive blend of pop and country music, characterized by her smooth vocals and cinematic production elements. She emerged in the music scene in the 1960s, becoming particularly well-known for her collaborations with songwriter Lee Hazlewood, which yielded the chart-topping hit "These Boots Are Made for Walkin'". Sinatra's music, characterized by its feminist undertones, has left a significant impact on both the pop and country genres, establishing her as a prominent figure in music history.