Heat oven to 325. Spray a 1-quart baking dish w/ cooking spray.
In lg bowl, beat cream cheese, sour cream, mayonnaqise, lemon juice, worcestershire sauce, dry mustard, garlic powder and 2 tbsp cheddar cheese until smooth. Fold in crabmeat, hot peppper sauce and old bay seasoning.
Transfer mix to baking dish. Top w/ remaining cheddar cheese and a sprinkling of old bay seasoning. Bake, uncovered 30 mins, or until bubbly and light brown.