Pre-heat oven to 350 degrees
Melt one stick of butter in 9x13 dish in warming oven
Pour out melted butter, layer in dish one can blueberry pie filling, one can crushed pineapple, one box yellow cake mix
Pour melted butter on top
Sprinkle 1 cup chopped pecans over melted butter
Bake until bubbly around edges
Serve with whipped cream or vanilla ice cream