In a large mixing bowl stir together 8 ounces sour cream, 20 ounce can crushed pineapple (do NOT drain), drained 11 ounce can mandarin oranges and 5 ounce box instant vanilla pudding.
Fold in 8 ounces whipped topping and mix well.
Chill until firm enough to spoon into a 1 graham cracker pie crust or serve over angel food cake. Enjoy!