1 pkg. lemon or lime low-calorie gelatin dessert
1 c. boiling water
1 (8 oz.) can crushed pineapple in unsweetened pineapple juice
1/2 of a 12 oz. can citrus or lemon-lime sugar-free carbonated beverage
4 oz. whipped topping (about 1/2 of an 8 oz. container)