Combine cherry juice blend and sugar in a medium saucepan. Cook over medium heat, stirring frequently, until sugar dissolves and mixture boils. Reduce heat; simmer 3 minutes. Remove from heat.
In blender or food processor container, combine cherries, orange juice concentrate and lemon juice. Blend 1 minute, or until cherries are pureed. In a 6-cup freezer container, combine cherry mixture and sugar mixture; mix well. Cover tightly; freeze 5 hours or overnight.
Remove cherry mixture from freezer 30 minutes before serving. Put 1/4 cup slush in each glass; add 1/2 cup carbonated beverage to each glass. Serve immediately. Freeze remaining slush for later use.
A shot of your favorite alcohol may be added to individual glasses when adding the lemon-lime soda if desired.