Jessica Simpson joined Weight Watchers for the second time.

Entertainment Tonight reports that the singer has been working with Weight Watchers since August.

Simpson joined Weight Watchers after gaining 70 pounds after the birth of her daughter Maxwell. However, she had to stop after seven months because she was pregnant again.

Since the birth of her son Ace Knute, Simpson is back with Weight Watchers.

"We were thrilled to welcome Jessica back on the Weight Watchers program in August," the company tells ET. "With a toddler on the run and an infant to look after, we know she needs a plan that's simple and fits into her life along with the support that's so important to moms with young children."

Despite being back with the program, The Daily Mail reports that Simpson was spotted at a Wendy's at 2 a.m.

"The cool thing about the program is that it focuses on healthy habits for the long-term (and I can still indulge in my guilty pleasures every now and then too)," Simpson said.

So Wendy's may just be a guilty pleasure for Simpson.

Photo Courtesy of ABC