Blackberry Lemonade

20 oz. fresh or frozen blackberries
2 twelve-ounce cans frozen pink lemonade concentrate
2 liters lemon-lime flavored soda

1. Puree the berries in a food processor until smooth. Press through a mesh sieve to remove seeds from puree.
2. In a large pitcher stir the lemonade concentrate, the soda and the blackberry puree.