HEAT oven to 400°F.
BRING milk and Alfredo sauce just to boil in large saucepan on medium heat, stirring occasionally. Meanwhile, mix Parmesan, parsley and garlic powder until blended.
SEPARATE fettuccine noodles. Add to sauce; stir to evenly coat. Transfer to 13x9-inch baking dish sprayed with cooking spray; top with chicken, Parmesan mixture and mozzarella.
BAKE 30 min. or until chicken is done (165ºF).