Heat oven to 400 degrees F. Unroll pizza dough on baking sheet sprayed with cooking spray; press into 15-by-10-inch rectangle. Bake 10 minutes. Mix mayo and ⅓ cup dressing; spread onto crust. Top with half the cheese, chicken, remaining cheese and bacon. Bake 5 minutes or until crust is deep golden brown and cheese is melted. Top with lettuce and tomatoes; drizzle with remaining dressing.