CAMERON DIAZ showed off her culinary skills on the set of new movie MY SISTER'S KEEPER by cooking up daily treats for her young co-stars.Sofia Vassilieva and Abigail Breslin played the Shrek star's daughters in the harrowing new film and Diaz felt the need to play set mum to them in her trailer, which she turned into a dining spot. Breslin explains, "Cameron would cook in her trailer a lot for us. She made excellent chili cheese fries with guacamole."

And Diaz wasn't about to make sure the girls ate healthy food: "Each one of them got to pick what they wanted to eat for lunch." But the treats weren't all fun for Vassilieva, who plays a cancer sufferer in the film.
Diaz says, "Sofia was on a special diet for the whole movie and her discipline was amazing. I kept trying to make her eat things she wasn't supposed to."