1 pkg. white cake mix
14 oz. sweetened condensed milk
8 oz. pina colada mix (Coco Lopez)
12 oz. Cool Whip
1 c. coconut

Bake cake mix per directions in greased 9x13 pan. Combine next 2 ingredients and mix well. Poke holes in cake while hot, using fork; pour liquid mixture over cake; cool. Frost with Cool Whip and sprinkle coconut on top; refrigerate until ready to serve.