Beyonce Slim Secrets After Childbirth Beyonce’s new look after giving birth to her first baby, Blue Ivy Carter, January 7 and make a lot of people by surprise. Beyonce reportedly lost weight to 18 pounds within a month. Jay-Z’s wife is the singer said she has worked hard to restore ideal body shape. Every day, she sports for two hours. She is also willing strict diet by simply eating six small meals a day high in protein. As quoted by page Hollyscoop, a source said, Beyonce is willing to do anything to regain slim body, as before pregnancy. For four weeks, she was hard work shed fat in the body.