Go here to add an e-coupon good for a FREE 1.8 oz. Nutella & GO! via SavingStar. The e-coupon is located at the very top of the page (looks like the picture below) and is valid through Sunday.
Remember that SavingStar savings does not come off at the checkout, but get added to your SavingStar account. If you are unfamiliar with SavingStar, see my post here which explains more about it.