Kiersten's Raspberry Fluff

6 8-oz containers of yogurt (I use Fruit on the Bottom, 3 Strawberry, 3 Raspberry)
1 large package instant vanilla pudding
12 oz. Cool whip
1 pkg. Frozen raspberries

*Beat yogurt and pudding well. Add cool whip and beat again. Stir in frozen raspberries and refrigerate about 1 hour. Stir just before serving.