1. Mix together all dip ingredients (cream cheese, chicken breast meat, mozzarella cheese, cheddar cheese, buffalo sauce, and ranch dressing).
2. Pour the mixture into a round dish.
3. Arrange blue corn tortilla chips on top to create a jack-o-lantern face.
4. Bake for approximately 30-40 minutes at 350°F.
5. Once baked, add a piece of celery for the jack-o-lantern's stem.
