Lemonade Pie
["1 can sweetened condensed milk", "1 small can frozen lemonade", "1 small container prepared whipped topping (Cool Whip)", "1 graham cracker crust"]
["Mix all ingredients until smooth.", "Pour in graham cracker crust. Chill several hours."]
["condensed milk", "frozen lemonade", "topping", "graham cracker crust"]