Want to know how celebrities really get buff and toned? The biggest Hollywood fitness myth is that they have great bodies because they have all the money in the world for personal trainers and professional chefs. While they may be able to afford these perks, they still have to do the work. Shape’s March cover girl, Jaime Pressly. “I’ve always exercised really hard,” says the 31-year-old North Carolina native. “I’m into the no pain, no gain thing!”

All that effort has paid off. Almost two years after giving birth to her son, Dezi, Jaime tops our annual list of the Sexiest Bodies in Hollywood.

Of course, Jaime’s allure goes way beyond toned abs. She also exudes self-confidence, a characteristic she finds appealing in others. Here, the Emmy-winning star of My Name Is Earl (and of the soon-to-be-released romantic comedy I Love You, Man) spills her secrets for getting sculpted and staying motivated—and dishes on what really makes a woman sexy.