Jessica Simpson's attempts to put the furore surrounding her recent weight gain behind her have been thwarted by an old enemy.

As Entertainmentwise reported previously, Jessica hooked up with Alex Astilean and his company Speedfit to make a fitness DVD in 2005.

The resulting video never saw the light of day because the Simpson clan were unhappy with the allegedly shoddy production values.

Four years and one lawsuit later, the video producer is using the fuss over Jessica's newly-curvy physique to help settle the score against the star and father-manager Joe.

Jessica performing in Charleston, West Virginia, yesterday

Astilean has leaked part of the original video showing a trim and toned Jess on YouTube.

"At least now she will get to feel how it is to be fat," he tells Page Six.

On Friday, Jessica's lawyer warned Astilean that be would be sued for defamation if he continued to smear the singer's reputation.

He previously claimed that failing to release the exercise DVD had caused “fat people” to die.

See the pictures that sparked the great Jessica Simpson weight debate below