Preheat oven to 350 degrees F and spray a 9x13 baking sheet with nonstick cooking spray. Spread pie filling onto the bottom of the pan. Sprinkle cake mix on top and spread evenly. Drizzle butter on top of the cake mix, making your best attempt to spread out over the cake mix evenly.
Bake for 40-45 minutes or until set. Cool for 15 minutes. Serve warm with ice cream.
To make Red Hearts:
Line a cutting board with wax paper and set aside.
Add a handful of candy melts and place them into a resealable sandwich bag but do not seal. Microwave for 30 seconds at 50% power. Flip the bag over and repeat. Knead the bag and microwave for 30 seconds more at 50% power. Knead until smooth. Snip the tip of the bag and pipe hearts onto the wax paper. Let set to harden.