Working mother hot Jennifer Lopez proudly shows off her huge

Wearing a beige trapeze coat, Jennifer Lopez's baby bump is proudly on display for all to see.

But the Latina beauty is not planning another addition to her family just yet - the rounded tummy is just part of her costume.

The 39-year-old actress is playing the part of a mother-to-be in her new movie The Back-Up Plan.

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In the film, Lopez's character is so desperate to have a baby she artificially inseminates herself.

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She becomes increasingly desperate to hide the signs of her pregnancy from her new man, resulting in a comedy of errors.

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However when he finds out the reason for her strange behaviour he decides to support her decision.

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J-Lo filmed several scenes with Moonlight actor Alex O'Loughlin, who plays her love interest in the film.

The 39-year-old actress was joined on the New York film set by her one-year-old son and daughter yesterday.

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Twins Max and Emme were cared for by Jennifer's mother Guadalupe as the actress filmed her scenes in the romantic comedy.

The holly crazy and hot celebrities Jennifer Lopez Shows Off Twin Daughter Emme

Jennifer Lopez was all smiles as she proudly showed off her twin daughter Emme Thursday on the Los Angeles set of her.

Since welcoming Emme and twin brother Max in February 2007, Lopez has said the babies have quickly developed their own distinct personalities.Emme "kind of like takes a step and stops and

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picks things up, and she's like, 'I don't know - maybe I'll eat this, I don't know. Mom, can I have

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some of your water? Oh, forget it!'" Lopez said on The R"Emme has her moments," the star said. "She's funny because we call her Emme-tude. We're like, 'She's giving us Emme-tude!'" She

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doesn't do the whole knocking everything down and all that, but when she catches an attitude, wooooah! She gets that from her dad. I'm kidding - she gets it from me!"

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Max "is more like the visceral boy, running, knocking things down, eating the world," said Lopez.achael Ray Show in April. "She's really kind of indecisive, but at the same time very precise."

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Alex O'Loughlin May Bite into the holly celebrity hotJennifer Lopez Movie

Sharpen those fangs, Moonlight fans, because Alex O'Loughlin is close to booking a new big-screen appearance.

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The Aussie actor, who starred at Mick St. John on CBS' cult vampire hit, is in talks to play the male lead in Jennifer Lopez's Back-Up Plan.

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Back-Up stars J.Lo as a woman who visits the local sperm bank in the absence of a main squeeze. But of course, her plan is upended when she meets the man of her dreams — the same day she learns she's pregnant.

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If O'Loughlin inks a deal, Back-Up could mean an even busier spring for him. The hunky thesp is also appearing in Whiteout, opposite Kate Beckinsale, and he was just cast in the CBS pilot Three Rivers.

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What do you think of O'Loughlin and Lopez meeting cute? Do they make a good pair?

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