Just three weeks after giving birth to twins Emme and Max on February 22, Jennifer Lopez hit the streets of New York City with hubby Marc Anthony, looking like she’s on her way to losing all of her baby weight. According a friend, the 5’6″ singer had gained more than 50 pounds during her pregnancy and was shocked by the changes in her body. To motivate her weight loss, J. Lo, 38, has splurged on a $50,000 home gym for her Long Island, N.Y. mansion. “She’s consulted trainers, nutritionists and doctors, looking for the safest way to drop the weight in record time,” her friend explains. Jennifer is also reportedly planning to start on Fresh Mommy, an all-natural food-delivery program created by Fresh Dining for expectant or new moms. In addition, Jen’s turned to her longtime trainer, Gunnar Peterson, who worked with her during her pregnancy and says they’ll resume their sessions soon. “Her main priority is the health of the babies, so she’ll start as soon as she gets the mommy routine down,” Gunnar tells In Touch.

ITW