1. Heat oven to 375°F.
2. Pour tomato sauce and undrained tomatoes into 13x9-inch baking dish. Stir in ¼ cup (4 tablespoons) Parmesan. Add chicken; turn to coat evenly both sides of each breast with sauce. Cover.
3. Bake 30 minutes or until chicken is done (165°F). Meanwhile, cook spaghetti as directed on package, omitting salt.
4. Top chicken with remaining cheeses; bake, uncovered, 5 minutes or until mozzarella is melted. Drain spaghetti. Serve topped with chicken and sauce.