1 (12 oz.) can pineapple juice, chilled
1/2 c. lime juice
1/2 c. sugar
1 qt. lime sherbet
1 (28 oz.) bottle lemon-lime carbonated beverage, chilled

Place pineapple juice, lime juice and sugar into blender. Spoon half of lime sherbet into blender. Cover and blend until smooth. Pour 1/2 cup of mixture into each of 6 (12 oz.) glasses. Add an additional scoop of lime sherbet to each glass. Fill each glass with chilled lemon-lime beverage.