HEAT oven to 350°F.
TOSS chicken with hot sauce; set aside. Combine cream cheese, sour cream, onions and 1/2 cup shredded cheese in medium bowl. Stir in chicken.
SPOON into shallow baking dish sprayed with cooking spray.
BAKE 25 min. or until heated through. Top with remaining shredded cheese, tomatoes and olives.
SERVE with chips.