weightwatchers230.jpg She'll get by with a little help from her friends!

Jessica Simpson is busy shedding her post-pregnancy pounds for her $4 million Weight Watchers deal, and she's staying motivated by enlisting her friends as a slimdown support group!

"Just bought all the girls in my Weight Watchers group pedometers to track their steps. 10,000 steps a day = 5 miles! Let's step it up!" she tweeted July 19. The 31-year-old new mom is required to lose an estimated 20-30 pounds by the end of August or she can't collect her endorsement money, a source tells Us Weekly.

In addition to the weight loss program, the blonde bombshell is busting her booty on regular workouts with celebrity trainer Harley Pasternak.

With some motivational support from her pals, Jess will back in her daisy dukes in no time!