Jenn's Lemonade Cheesecake

1 pkg (8oz) Philadelphia Fat Free Creame Cheese, softened
1 tsp CRYSTAL LIGHT Lemonade Flavor drink mix
1/4 cup cold fat-free milk
1 tub (8oz) COOL WHIP FREE whipped topping
1 ready-to-use reduced fat graham cracker crumb crust (6oz)

Beat cream cheese and drink mix in a large bowl with mixer until blended. Gradually beat in milk. Whisk in Cool Whip; spoon into crust. Refrigerate 4 hours or until firm.