PREHEAT oven to 350°F. Toss chicken with hot sauce; set aside. Mix cream cheese, sour cream, 1/2 cup of the shredded cheese and the onions in medium bowl. Stir in chicken.
SPREAD into casserole dish or 9-inch pie plate.
BAKE 25 min. or until heated through. Top with remaining 1/2 cup shredded cheese, the tomatoes and olives. Serve with the chips.