Jennifer Lopez has reportedly flown her personal trainer from California to New York to help her get rid of her baby weight ASAP.

The star gave birth to twins Max and Emme last month and was, you could say, eating for three, although the singer/actress didn't appear to have ballooned aside from the obvious big bump.

Lopez wants her Beverly Hills-based fitness guru Gunnar Peterson to devise a plan to help shed the excess pounds rapidly.

A source told the National Enquirer: "She wants to lose the baby weight fast. She wants to trim at least 20 to 25 pounds right away. She put on almost 40 pounds when she was pregnant with the twins.

"Jennifer called Gunnar and asked him to get on a plane as soon a possible to come to New York.

"Gunnar has Jennifer doing different high-cardio workout programs at her home gym for an hour to an hour and a half every day."