Lemon-Lime Cake with Pineapple Frosting

1 box lemon cake mix
1 pkg (3.4 oz) lemon instant pudding mix
1 cup Sprite
3/4 cup vegetable oil
4 lg eggs

Preheat oven to 350. Spray pans with cooking spray.

Combine cake mix, pudding mix, Sprite, oil, and eggs in large bowl; beat at medium speed until batter is smooth. Pour batter in pans.

Bake 18-20 min or until toothpick inserted in center comes out clean.
Cool cake and ice with Pineapple frosting. If stacked, do not frost sides.

ICING:
1 tub of Vanilla frosting.
Add 1 8oz can crushed pineapple, drained.
(1 1/4 cups coconut optional)
Mix well.
Hint: If you beat the can of frosting first, it will almost double in size.