Easy Blueberry Cobbler

1 20 oz. can pineapple tidbits or crushed pineapple
1/2 c brown sugar
1 1/2 tsp ground cinnamon
1 can blueberry pie filling
1 box white or yellow cake mix
1 c butter, melted

Pour pineapple and juice in a sprayed 13 x 9 pan. Sprinkle brown sugar and cinnamon over pineapple. Pour blueberry pie filling over the pineapple. Sprinkle the dry cake mix over the blueberry pie filling and pour melted butter over it.Bake uncovered at 350 for 45 minutes or until bubbly and golden brown.
Serves 12