Nick Lachey's ex Jessica Simpson and his current wife Vanessa Minnillo Weight War?

Nick Lachey's ex Jessica Simpson and his current wife Vanessa Minnillo are at war over who can loose the most baby weight!

According to the National Enquirer., "The new moms are locked in a heavyweight battle over who will be the first to fit into a bikini."

"Jessica is still struggling to drop her baby weight, and Vanessa has vowed to lose the extra pounds before she does," a so-called "source" tells the Enquirer.

"Vanessa is very competitive. Not only does she want Nick to know he made the right choice when he married her, but she knows it will drive Jessica insane to see her flaunting her sexy post-baby body"