Begin by washing and removing the stems from all of the strawberries. Once you have finished, start to puree them. Pour some of the lemonade on top. Lemonade should reach about half way up the container so the mixture is not too chunky once it is blended. Once you are finished, combine all the lemonade and strawberry puree in to one container. Before sealing, add a large fresh squeezed lemon to each. When you are ready to serve, combine the lemonade mixture, champagne, and two cans of frozen concentrate in a punch container.