In punch bowl, combine Crystal Light, cold water, pineapple-grapefruit drink and lemon juice; stir until powder dissolves. Stir half of the sherbet to soften; blend into punch mixture. Top with scoops of remaining sherbet.
Rest bottle of carbonated beverage on brim of bowl and pour into bowl; stir gently. Makes 36 servings. Add red maraschino cherries, frozen in ice cubes, for a festive holiday look. Great for Christmas parties!