HEAT oven to 425°F.
SPRAY 2-qt. baking dish with cooking spray; set aside. Combine chili, corn, tomatoes and VELVEETA.
LAYER 1/3 of the chili mixture in prepared baking dish; top with half the chips. Repeat layers. Cover with remaining chili mixture.
BAKE 30 min. or until VELVEETA is completely melted and mixture is thoroughly heated.