Citrus Punch

2 cans (6 ounces each) frozen limeade or lemonade concentrate, thawed

3 cups cold water

2 cans (12 ounces each) lemon-lime soda (3 cups), chilled

½ pint line or lemon sherbet (1cup), softened 

Mix limeade concentrate and water in large pitcher, just before serving, stir in soda. Pour into punch bowl; float scoops of sherbet on top.