Unlike most actors who usually try to lose weight for a film, super-fit Fergie got to indulge in pretty much whatever she wanted to eat for her new movie, Nine. “I’ve actually gained 10 pounds,” she told reporters yesterday. “No, really — for the film Nine. Actually, 13 to be exact. I ate everything. Fish and chips. Everything fried, things I don’t normally eat.” But all good things come to and end and Fergie is back to her old regimen. “I have to give it up!” she said. “Back to Diet Designs, my food-delivery service.”