Tropical Party Punch

1 12-ounce container frozen tropical fruit juice concentrate
2 2-liter bottles Diet 7-Up or Sprite
Fruit sherbet, any flavor
Orange, lemon or lime slices
Ice cubes

Pour ice cubes into punch bowl, filling about half way. Empty the frozen fruit juice into the bowl. Slowly add sodas, breaking up the fruit juice. Stir gently until dissolved. Add a scoop or two of sherbet and float fruit slices on top.