Preheat oven to 350 degrees F. In a bowl, stir together cake mix (add 1/2 cup old fashioned oats if you want to add those for fiber and texture) and melted butter until you have a crumbly texture.
Spray 9x13" pan with non stick spray. Spread the cherry pie topping evenly in dish. Top with the crumbly cake mixture. (I used my hands to crumble it over top).
Bake for approximately 30-35 minutes, or until golden brown. Remove from the oven and let cool slightly before serving. Scoop it out into bowls and top with ice cream or whipped cream