Now, on Wednesday morning, you can catch her performance in The Early Show's Summer Concert series.
Dressed in a sexy "Daisy Duke" outfit, she sang "These Boots Are Made For Walking." The updated version of Nancy Sinatra's 1960s hit is from the soundtrack for "The Dukes of Hazzard."
She also performed "Son Of A Preacher Man," offering a preview of her upcoming album and "With You," from her last album,
Her new album will be released in November, and Simpson tells The Early Show co-anchor Harry Smith it has a southern vibe to it.
"It was nice to kind of do something that Patsy Cline would do or Willy Nelson," Simson says, "Teaming up with him was a dream come true." The ountry crooner also stars in the film as Uncle Jesse, and is on the video for "These Boots Are Made For Walking."
Simpson says she also drew inspiration from Shania Twain's music to do her album. Expect rhythms designed to get you to dance. But that is not all, she says, "I did some classic ballads and actually some old school R&B fun stuff. It's all over the place."
The pop star got a lot of cheers from The Early Show audience for her performance on the movie's soundtrack video and her Daisy Duke figure.
"I worked out hard for that video," she says, "You have to. You're trying to be the next Catherine Bach, and you'll be on the posters, hopefully of some walls, and you have to make those shorts look good and make those bikinis look good. I had to work very hard."
Her husband, Nick Lachey, and their dog, Daisy, were with her. For those who are wondering, she says, "We're still in love. Still married."
The Dallas, Texas, native, who turned 25 on July 10, made her mark as a contemporary Christian musician, sharing the stage with such gospel performers as Kirk Franklin and CeCe Winans.
In 1999, she made her debut album, "Sweet Kisses," for Columbia Records. And after going on tour, she released her crossover hit, "Irresistible," in 2001. Last year, she marked her debut as a songwriter with "In This Skin." For her video "With You," she received two MTV VMA Nominations, for Best Female Video and Best Pop Video.
The successful singer also became a reality TV star. Her hit MTV show "Newlyweds" had a three-year run. She also had a recurring role on "That 70's Show." And this past weekend, she wasas Daisy Duke in the film remake of the classic '80s TV series, "The Dukes of Hazard."
Simpson has been married to Lachey (of 98 Degrees fame) for three years. She started dating Lachey at age 18 and married him at age 22.