Sunshine Cake

This is my daughters recipe and oh soooo good!!
1 yellow cake mix
1 can crushed pineapple
1 can mandarin oranges
1 small box vanilla instant pudding
1 12oz tub of cool whip

bake cake according to directions
let cake cool for about 15-30 min
poke holes in the cake and pour the juice from the pineapple over the cake and let set until cake is completely cool
mix cool whip and pudding together, then fold in the oranges and pineapple.
Spread on top of cake. Refrigerate until cold and enjoy