Mix pudding and pineapple together until well blended. Fold in whipped topping. Pour into a ready made pie shell (shortbread cookie crust, graham, or vanilla wafer). Refrigerate 2 hours.
**Let whipped topping thaw by it self...Do not stir it to hurry the process!
Other flavors of instant pudding can be substituted instead of lemon (example pistachio, coconut cream, banana cream)