Skinny Cherry Poke Cake 

INGREDIENTS
1 box white cake mix
10 oz (of a 12 oz can) of diet lemon-lime soda - I used Sprite Zero
2 egg whites
1 (.3-oz) sugar-free cherry Jell-o
1 cup boiling water
½ cup cold water
1 (1-oz) sugar-free instant vanilla pudding
1-1/2 cups cold fat-free milk
Lite Cool Whip, to taste (I used about half a container)
http://www.yummyhealthyeasy.com/2013/08/skinny-low-fat-cherry-poke-cake.html