Jennifer Lopez poses with a furry friend at the premiere of CBS Films' The Back-up Plan.

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Don't be fooled by the bump she's got, there's no baby on board for Jenny on the block!

Jennifer Lopez is only playing preggers as you can see in this photo snapped Tuesday on the set of her new movie The Backup Plan. The real life muy caliente mama of twins is only pretending at the Pasadena, California shoot to have two babies on the way.

So that's the JLodown on the make believe maternity, but click here to see the stars who really are about to deliver. (Photo: Splash News)

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