Jessica Simpson's workout and diet pays off; Singer shows off her new legs [PHOTOS]

Jessica Simpson is proving that working out, eating clean, joining the Weight Watchers program, and staying active pays off.

The mother-of-two showed off her new legs via Instagram over the weekend, with the photo caption that read: "These are my legs during a workout today."

The singer added, "I'm proud of myself. Thx @tkrefting and @harleypasternak #nofilter," giving a shout to her trainers, Teri Ann Krefting and Harley Pasternak.

The 33-year-old has also been about of the Weight Watchers team, revealing that the weight loss program has helped her gain a healthy body.

The singer admits she didn't know what to expect when she first started Weigh Watchers meetings.

Simpson said, "It's so much better to have some back up to do it together because we all face similar challenges." She added that the support of her meetings keep her "focused, and motivated."

Watch her full Weight Watchers commercial here.