2 c. orange juice
8 oz. frozen pineapple juice concentrate
1/4 c. freshly squeezed lemon juice
2 tbsp. freshly squeezed lime juice
1 c. sugar
8 slices canned pineapple, including juice
2 qt. 7-Up
crushed ice

Mix together first 5 ingredients and refrigerate for at least 2 hours. Just before serving, place mixture in a punch bowl and add remaining ingredients.