The 31-year-old singer-designer was seen arriving at a gym to embark on her weight loss regime. She was also photographed while going for her morning workout, reported Daily Mail online.
Simpson gave birth to her first child Maxwell Drew with fiance Eric Johnson on May 1.
She is on a strict timeline to lose weight as she has signed a USD 4 million deal asto endorse Weight Watchers, a company that offers dieting products and services to assist weight loss and maintenance.
She is also reportedly on a strict diet.
