Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain.
In a large skillet over medium heat, cook bacon until crisp. Drain and crumble.
In a large bowl combine spaghetti, bacon, celery, onion, bell pepper, olives, tomatoes, salad seasoning, salad dressing and Parmesan. Toss to coat. Chill until serving.