Cook campanelle according to package directions, adding peas during last 1 minute of cooking.
Drain and rinse with cold water until completely cool.
Combine Hellmann's® or Best Foods® Real Mayonnaise, sour cream, mustard, onion and celery with wire whisk in large bowl. Season, if desired, with salt and pepper. Stir in pasta and herbs.
Serve at room temperature or cover and chill, if desired.