Orange Cake--Light and Refreshing

I was attending a weight loss class and got this recipe. I come from a family of eaters who love fattening desserts and they ate this and didn't know it was LOW FAT. :) Now everyone asks for the recipe. Hope you like it.

• Ready In: 50 mins
• Serves: 12

Ingredients

• 1 (16 ounce) container Cool Whip Lite
• 1 (8 ounce) can mandarin orange segments (can use 2 cans if you really like them)
• 1 (16 ounce) can  crushed pineapple in juice or 1 (16 ounce) can pineapple chunks in juice
• 1 (18 ounce) box  white cake mix (any brand works)
• 12  ounces  diet orange soda or 12  ounces  regular  orange soda

Directions

1. Mix cake mix and orange sunkist with mixer until smooth *do not add eggs, oil etc that cake calls for.
2. Grease cake pan (can use any size).
3. Bake according to pan size, temps on cake mix box.
4. DRAIN mandarin oranges and pineapple very well.
5. Mix oranges and pineapple together.
6. Fold mixture into Cool Whip and refrigerate.
7. After cake is done and cooled, add orange/pineapple/cool whip topping and serve.
8. Tip: If you do not drain the pineapple and oranges well enough, the topping will be somewhat soggy. If this happens, a couple hours refrigeration time with stiffen it up.
9. Good luck and I hope you enjoy it. Let me know if any errors -- this is my first recipe I have posted here :).