How can I lose belly and arm fat, but keep my weight in other areas (such as butt and boobs)?

I am a 28 yr old female, 5’3 122 lbs. I don’t consider my self fat, but I do have stubborn belly fat in my lower abdomen that sometimes makes me look pregnant! If I diet and try to shed extra pounds, my stomach shrinks a little, but my boobs and my butt shrinks to nothing!! How can I lose this kangaroo pouch, but keep a healthy chest and butt?