Jessica Simpson's personal life may be going through some turmoil thanks to her parents' divorce, but she's not letting it keep her from the gym!

The singer was spotted leaving the gym in Los Angeles yesterday, sporting a big smile and a sweatshirt from her fiance Eric Johnson's alma mater, Yale.

Simpson looked like she was in a great mood ... just days after her mom Tina filed for divorce from her husband of 34 years, Jessica's father Joe.

Jessica has been working hard on her post-baby body, hitting the gym on a regular basis and teaming up with Weight Watchers on her diet.

Last month she revealed she's already lost 40 pounds since giving birth to baby Maxwell.

"My body is not bouncing back like a supermodel," she said at the time. "I'm just your everyday woman who is trying to feel good and be healthy for her daughter, her fiancé and herself."

Check out more stars who have bounced back after giving birth in the gallery above!


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