Bellyfattener18:
My recommendation is to eat trans fats, they redistribute fat from other areas of the body to the belly, as well as creating fat there also. Don't eat too much though as trans fats are notoriously bad for your heart if consumed in large quantities.
My advice (and that of my much more knowledgeable-about-nutrition wife) would be NOT to SEEK OUT additional trans fats in your diet... If you are a fatty, eating processed or fast food, you are probably getting more than enough of these as it is! Most of us hit "large quantities" without trying. As she always says, "You want to be fat, not dead!"
Sadly, most of this is genetics. If there was a may for me to redirect fat away from chest, thighs and butt to my belly, I would do it! Sadly, there is not. You just have to love the fat you get!