Simpson starred with Lachey in the MTV reality TV series "Newlyweds." (MTV is owned by Viacom, which is also the parent company of CBSNews.com).
"You know," Simpson said, "the track record on that is (not good). You know, we like to do the specials, and we went over to Iraq and performed for the troops. We like to do stuff like that.
"I don't know if we'll ever really do a movie together. I read somewhere that we were going to do 'Grease.' I was like, 'Oh, Lord.' "
"Dukes," which also stars Johnny Knoxville and, zoomed right to the this weekend, taking in $30.6 million in its first three days of release, according to studio estimates Sunday.
Simpson will perform some songs on The Early Show Wednesday, including "These Boots Are Made for Walkin'," from the "Dukes" soundtrack. The song is a remake of thehit.
Simpson told Smith she wanted very much to play Daisy: "I grew up watching "The Dukes of Hazzard (TV series). I'm from the South. It was definitely just part of the southern way. You watch "Dukes of Hazzard, you want to be in the General Lee (the car featured in the show), you want to step into the Daisy Dukes (short cutoff jeans shorts worn by Daisy).
"Especially when I heard Willie Nelson and Burt Reynolds and Johnny Knoxville and Seann William Scott, such an amazing cast. And we all had an amazing time together."
Simpson says she had some special help: "Lynda Carter who coached me on how to wear a bathing suit every day, because she was 'Wonder Woman.' Who would know better?"