Amazing Crab Shells

36 jumbo pasta shells
2 8 oz pkg cream cheese
1 lb crabmeat
6 oz cooked tiny shrimp
1 onion, minced
2 stalks celery, chopped
1/3 c mayonnaise
2 T sugar
1 1/2 t salt
1/2 t ground black pepper
1 t lemon juice

Bring a large pot of salted water to boil, and add pasta shells; boil until al dente. Drain well. In a large mixing bowl, combine cream cheese, crab, shrimp, onion, celery, mayonnaise, sugar, salt, pepper and lemon juice; mix well. Stuff cream cheese mixture into the jumbo pasta shells. Chill for at least 2 hours before serving.