preheat oven 350

chop nuts set aside

microwave butter on high 1 min

combine better and brown sugar i 9 x 13 baker,mix well spreading evenly over bottom

drain pinapple resezrving juice,set aside

arrange pinapple slices over sugar mixture, place a cherry in center of each pinapple slice

sprinkle with nuts

add enough water to pinapple juice to make 1 1/3 cups liquid

combine cake mix ,liquid,eggs,and oil,whisk until well blended and smooth

pour over fruit mixture, bake 35 to 40 minutes

cake tester comes out clean

remove from oven cool 5 minutes

invert onto 18 by 12 board, cool

open star tip fill with whipped topping