Jessica Simpson Slims Down....

Jessica Simpson has stunned fans by shedding an estimated 25 pounds (11.3 kilograms) in a month.The pop star/actress hired celebrity trainer Harley Pasternak to help her get back in shape after a little careless eating left sexy Simpson feeling fat.Pasternak put his star client on a strict 1,300-calorie-a-day diet, delivering his own nutritional meals to her doorstep.The trainer's 5-Factor Diet and Fitness plan has also been adopted by Vanessa Williams, Katherine Heigl and Simpson's on-off boyfriend John Mayer.Pasternak admits he's impressed with Simpson's weightloss: "We're making Jessica taut and toned without taking away her femininity."

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