Preheat oven to 350F. Prepare a 9x13 baking dish with nonstick spray.
Cook the spaghetti al dente, according to package directions. Drain and set aside.
Remove the meat from the rotisserie chicken, shred or dice, and set aside.
In a large pot, you can use the one you cooked the pasta in, combine the Velveeta, cream cheese, Rotel, and condensed soups.
Stir to combine and cook over medium heat, stirring, until the cheese is melted and everything is combined.
Add the spices and stir well.
Add in the cooked spaghetti noodles and the shredded chicken. Toss to combine.
Pour the mixture into the prepared baking dish.
Cover with the cheddar and mozzarella cheese.
Bake for 25-30 minutes or until bubbly and the cheese is melted.
Remove and serve hot with salad and garlic bread if desired.