Easy and Moist Pineapple Cake

1 yellow cake mix
1 pkg. Vanilla pudding (either size)
1 (20 oz.) can crushed pineapple
1 (8 oz.) package cream cheese
Whipped cream for topping

Bake cake according to package directions. Mix pudding, pineapple and cream cheese together. Spread on top of cooled cake. Top with whipped cream. Refrigerate one hour before serving.