Preheat the oven to 350 degrees F. Spray preferred pan with nonstick spray, I line the springform with the cut round parchment paper liner. (I used a round 9 inch springform pan for easier removal, but this recipe can be made in any 9x9 baking pan. **If you use a springform pan, place it on a baking sheet, to catch a few drips).
Melt the butter in the microwave then pour in your pan. Open the can of pineapples and reserve the liquid into a measuring cup.
Add enough water to that pineapple juice to create 1 full cup of liquid. Set aside for now. In a mixing bowl, prepare the cake mix by combining boxed mix, with 2 eggs, oil and the 1 cup of pineapple/water.
Sprinkle the brown sugar evenly on to the bottom. Then place the drained pineapple slices over the brown sugar. (Use as many as you can fit.)
Place the cherries (stems removed) in the center and in between the pineapple slices. Carefully pour the prepared cake mix batter over everything.
Bake for approximately 45-50 minutes, or until an inserted toothpick comes out mostly clean with moist crumbs attached.
Remove from the oven and let the cake sit on a cooling rack for 5 minutes. Release clasp on outside of springform pan and remove. Place a plate on the top and carefully flip upside down so the bottom of the cake with the fruit is now on the top.