Avocado Cream Pie

1 large or 2 small avocados
1/2 cup lemon juice
1 cup sweetened condensed milk
8 ounces cream cheese
1 (8 ounce) container Cool Whip
1 (9-inch) graham cracker crust

Blend all ingredients in food processor. Pour into graham cracker crust. Garnish with Cool Whip and freeze about 45 minutes and serve.