Jennifer Lopez has confessed she was terrified of returning to a movie set after giving birth last year as she feared she might have forgotten how to act while looking after her twins, Max and Emme. The singer/actress, who is now filming the romantic comedy ‘The Back-Up Plan’, admits, “The few days before shooting, I got really nervous. I was like, ‘What if I forgot how to act?'” However, J-Lo’s fears were unsubstantiated and she says she now brings her son and daughter to the set with her. “I love it. Honestly, one of the best days of my life was the first day back working on this film. I wanted to do it really badly and bringing up my babies with me that first morning. I was like, ‘oh, my God, they’re with me. I’m making a movie and they’re here!’ It’s great having kids on set. It’s the best!”