Step 1

Cook pasta according to package directions in a large pot of salted water.Drain and rinse under cold water. Set aside.

Step 2

In a large bowl, stir together mayonnaise, Russian dressing, capers, lemon juice, celery seeds, Old Bay seasoning, salt and pepper.

Step 3

Stir in pasta, celery, onion, shrimp and green onion.

Step 4

Refrigerate at least 30 minutes before serving.