Dorito Cheesy Chicken Casserole

3 cups cooked chicken, chopped (I used a rotisserie chicken)
8 oz sour cream
1 can cream of mushroom soup
1 can cream of chicken soup
1 1/2 cups salsa or 1 can Rotel
1 can of corn, drained
2 cups Mexican cheese, shredded
1 bag of nacho cheese Doritos

Preheat oven to 350 degrees.

Lightly spray a 9x13 pan with cooking spray.  Crush the entire bag of Doritos and cover the bottom of the dish.  Reserve one cup of cheese.   Mix together remaining ingredients in a large bow.  Pour chicken mixture over the Doritos.  Bake for 20 min. Top casserole with the remaining cheese and bake 5 additional minutes or until melted