Jennifer Lopez wanted bump break

Jennifer Lopez thinks life would be "perfect" if your pregnancy bump was removable.

The 39-year-old actress - who has 17-month-old twins Max and Emme with husband Marc Anthony - is currently shooting new movie 'The Back-Up Plan' in which she plays a pregnant woman, and loves being able to expand and retract her midriff girth as she pleases.

She joked: "A bunch of us who have babies, we're like, 'It would be great when you are pregnant. You could take it off five times during the pregnancy, only for a half hour. Then you have to put it back on.' That would be awesome. It would be perfect. But you can't."

Jennifer - who plays Zoe, a woman who conceives using artificial insemination only to meet her perfect partner that very day - has loved making the film because she can take her children to work with her.

She explained to US TV show 'Extra': "They've been with me almost every day on the set. I don't think they realise what I do. Once in awhile, they look at the monitor and go, 'Mama'. They're just starting to talk.

"I put Max to bed yesterday and I said, 'I love you baby. I'll see you tomorrow.' And he was like, 'I love you.' "