The 1970s saw Nancy Sinatra experimenting with various musical styles and collaborating with notable artists. Her 1970 album, "The Girl and the Gun," featured a more country-oriented sound, while her 1971 single, "I Stand Alone," demonstrated her ability to tackle more introspective, poetic lyrics.

In 1973, Nancy released the critically acclaimed album, "Last to Know," which included the hit single of the same name. This song, written by Burt Bacharach and Hal David, showcased Nancy's impressive vocal range and emotional delivery.

The 1980s also saw Nancy collaborating with artists such as Kenny Rogers and Julio Iglesias. Her 1985 duet with L. T. Cool, "How Deep Is Your Love," was a moderate success, and her 1987 album, "Eighteen with a Bullet," featured a more contemporary, rock-oriented sound.

In the 1990s and 2000s, Nancy Sinatra continued to release music, albeit at a slower pace. Her 1995 album, "King's Record Shop," was a nostalgic tribute to her father's musical legacy, while her 2000 album, "There Goes My Baby," showcased her ability to reinterpret classic songs.