1 (10 oz.) pkg. frozen red raspberries
1 (8 oz.) can crushed pineapple, chilled
1 (12 oz.) can frozen lemonade concentrate, thawed
2 qt. lemon-lime carbonated beverage, chilled

In a blender container, combine raspberries and pineapple. Cover; blend until smooth. Pour into punch bowl. Stir in lemonade concentrate. Slowly add carbonated beverage. Makes 20 (8 oz.) servings.