Jessica Simpson bought every member of her Weight Watchers group a pedometer.

The 'Fashion Star' host - who signed a $4 million deal to become an ambassador for the weight loss brand earlier this year - treated participants to the devices which help track the wearer's Steps.

The generous star announced on her twitter page: ''Just bought all the girls in my @weightwatchers group pedometers to track their steps. 10,000 steps a day = 5 miles! Let's step it up!''

Jessica gave birth to her first daughter with fiancé Eric Johnson, Maxwell Drew, on May 1.

The 32-year-old designer recently revealed that she doesn't have a specific weight that she needs to reach in order to stay in line with her agreement.

She said: ''There's not a goal weight - I just want to feel normal and fixate on inches.

''I really want to set small goals, so I'm constantly reaching goals and not looking at something so far ahead.''

Meanwhile, a friend revealed that Jessica is committed to her exercise routine.

The divulged: ''She understands it's a process. [She is] working very hard and she's excited.''