Preheat the oven to 400 degrees F. Scrub potatoes & pierce with a fork. Bake potatoes for 30 minutes or until tender. Dice potatoes & let cool slightly.
In a large bowl, place the celery, 1/4 cup green onions, bell pepper & chicken. Add the cooled potatoes. In a medium bowl stir together the mayonnaise, sour cream, wing sauce, vinegar & blue cheese. Pour over vegetables. Add olives & toss to combine. Sprinkle with remaining green onions, cheddar cheese & bacon.