JSimpson052111_01_X17crop230.jpgJessica Simpson has a big incentive to lose all that excess baby weight ... and that incentive is in the millions!

Maxine Drew Johnson's mom is the new spokesperson for a Weight Watchers national campaign.

Online reports are estimating the deal to be between $3 - $4 million. Talk about a smart businesswoman.

The Fashion Star mentor's fashion line grossed more than $1 billion last year. Cha-ching!

The 31-year-old singer just gave birth to little Maxi on May 1.

We can't wait to follow Jess' weight loss.