Todd and Jenny s Favorite Summertime Fluff Pie

2 (6 ounce) containers lemon yogurt

1 (8 ounce) container extra-creamy whipped dessert topping

1 cup blueberries

1 cup raspberries

1 cup blackberries

1 (9 inch) prepared deep dish graham cracker pie crust

Mix lemon yogurt and whipped dessert topping together in a large bowl. Fold blueberries, raspberries, and blackberries into the yogurt mixture; pour into prepared pie crust.

Refrigerate until the mixture sets, about 4 hours.