Got a great icing recipe from a professional pastry chef. It's delicious.
1 large tub of cool whip 2 cups sour cream 1 cup granulated sugar
Stir ingredients together, do not whip. If you want chocolate icing use the above recipe and add powdered cocoa. If you want coconut icing just mix some shredded coconut into the white icing and then push more up against the frosted cake with a plate.