Singer Jennifer Lopez has admitted that she has been struggling to stay slim after giving birth to her twins with husband, Marc Anthony.

The “American Idol” judge told Contact Music that she now has to work doubly hard in order to keep her curvy figure - - the first thing that Hollywood noticed when she first entered the business.

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"I''ve always been athletic and really enjoyed that. And I''ve never been a big eater which always works in my favour,” the ‘Back Up Plan’ star began in her confession to Contact Music.

She continued, “"But since I had the babies, it's been harder. Your body does change. Not too drastically, but I definitely have to work harder and watch what I eat more.”

Now with 3-year-old twins, Max and Emme, the 41-year-old singer and actress disclosed that she even has to work harder on some body parts which she never did as much before the babies came into the picture.

Lopez said, “I've never had to work on my stomach before - it was like, concave, I was a lucky person - but since the babies, I do. I really have to work on it," she added.”

The actress, according to MSN News has maintained not going under the knife when asked her today. But she was quick to note that she may change her mind depending on how her body changes as she gets older.

"I don''t know if I''d have surgery. I don''t know how I''ll feel in my 50s and 60s. I can only speak for me and I don''t feel like it''s something I want to do. But when things have changed, I might feel very differently. I reserve the right to change my mind," Lopez was quoted as saying by MSN News.

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