Raspberry Zinger Poke Cake

Raspberry Zinger Poke Cake 1 (18 ounce) box white cake mix 10 ounces diet Sprite 2 egg whites 1 (3 ounce) box raspberry Jell-O gelatin sugar free 1 1/2 cups boiling water 8 ounces Cool Whip 1/4 cup flaked coconut Take dry cake mix and add the 2 egg whites and soda. Mix well with electric mixer. Pour into ungreased 9×13 dish and bake as directed on the box. Let cool for 15 minutes Then take the boiling water and add the jello. Stir till jello is disolved. Poke holes into your cake with end of wooden spoon. Then pour jello mixture over the cake. Cover and referigerate 2 hrs or overnight. Then spread on the cool whip and top with coconut.