pumped

Doing ab work alone will not reduce your chubby stomach - Ab work tightens the muscle under the fat - you need to get rid of the fat covering the muscles to have the flat stomach that you desire. After reading your erronious post to itsgotta be natural, I know that you don't care for weight training all that much so that will make your endeavor more difficult - not impossible though. Try to do interval training. The high intensity added to a moderate session will keep your body burning the fat after your session is complete, while the length of a moderate session will burn the fat while you're exercising.
You should really read my post to itsgotta be natural - it'll help you out a lot. And it's factual.
Good Luck