Preheat the oven to 350 degrees. Spray a 9 x 13 pan with cooking spray and set aside.

In a large bowl add the eggs and beat well.

Add in the vegetable oil, sour cream, and water and whisk until well combined.

Pour the lemon cake mix into the bowl and mix for 2 minutes or until smooth and well combined.

Pour the cake batter into the prepared pan and bake for 28-32 minutes or until a toothpick inserted into the center comes out clean.

Remove from oven and cool for 10 minutes.

Using the end of a wooden spoon or a wooden skewer poke holes all over the cake.

Pour some of the pie filling on top of the cake and spread it around so that it goes down into the holes. Repeat until no more filling goes into the holes and a small layer of pie filling is left on top of the cake.

In a large bowl combine the whipped topping, vanilla extract, and powdered sugar. Mix well to combine.

Spread the topping over top of the cake.

Top with sprinkles or lemon slices if desired.

Refrigerate cake until ready to serve.