PREHEAT oven to 350°F. Spray both sides of tortillas with cooking spray; place in single layer on baking sheet. Bake 10 minutes or until crisp and lightly browned.
MEANWHILE, bring water to boil in large saucepan. Stir in rice; cover. Remove from heat; let stand 5 minutes. Stir in chicken, corn and barbecue sauce. Return to medium heat; cook and stir 5 minutes or until heated through.
SPOON evenly onto tortillas; sprinkle with cheese.