Pop diva Jessica Simpson is facing a legal battle with a fitness company after disagreements over the singer's workout in an exercise video.

"The Newlyweds: Nick And Jessica" reality TV star had last year signed a multi-million dollar contract with the SpeedFit company to star in their fitness video, reported the Internet Media Database.

After seeking help from trainer Michael Alexander to get into shape for her hotpants-wearing role of Daisy Duke in the film adaptation of "The Dukes Of Hazzard", Simpson reportedly wanted Alexander's work-out to be incorporated into the fitness video.

But SpeedFit's producers told Simpson that Alexander's style didn't fit their idea of fitness and are now considering a lawsuit.

Simpson's business manager says, "We've been trying to make this work. We thought Mike would increase the marketability of the exercise program."