It's only been a week since Jessica Simpson gave birth to her beautiful baby girl, and the star is already thinking about slimming back down.The mother of Maxi has about three million reasons to, of course.According to online News, the 31-year-old singer signed a $3 million deal with Weight Watchers in which she'll showcase her fit post-baby body.

Jessica will star in a national campaign for the brand this year.That's a lot of money to lose weight ... not that she needs it.Jessica has numerous business endeavors, including perfume, lip gloss, beauty products, hair products and commercials and her Jessica Simpson Collection of handbags, shoes, accessories and and boots broke $1 billion in sales last year.Simpson and her fiance, Eric Johnson, welcomed their 9-lb., 13-ounce daughter Maxwell Drew on May 1. Despite reports that she's already having a meltdown over going back to work, Jessica gushes that she's happy as ever.

Actress, singer and fashion designer Jessica Simpson gave birth to her first baby on Tuesday, a girl named Maxwell Drew Johnson.Simpson and her former football player fiance Eric Johnson announced Maxwell's arrival on her website."We are so grateful for all the love, support and prayers we have received. This has been the greatest experience of our lives," the couple said.Simpson, 31, and Johnson, 32, became engaged in November 2010, but have yet to set a wedding date.Simpson rose to fame as a teen pop star and became a household name after starring in a TV reality show with then new husband Nick Lachey, a member of the boy band 98 Degrees. The pair divorced after three years of marriage.