Preheat oven to 350 degrees F (325 for glass baking dish). Grease a 9x13 baking pan.

Dump undrained pineapple into the baking dish and spread it out evenly.

Using a spoon, dump globs of cherry pie filling on top of the pineapple.

Sprinkle the cake mix evenly over the cherry and pineapple layers.

Cut butter into slices with a butter knife and place slices evenly over cake mix.

Bake for one hour.

To serve, scoop cake out with a large spoon like a cobbler, and dump it on a nice plate. A scoop of vanilla ice cream dumped on top is delicious! Serve warm or cold.