SLICE 1 cup of the strawberries; set aside. Halve the remaining 3 cups strawberries; set aside. Stir boiling water into dry gelatin mixes in large bowl at least 2 min. until completely dissolved. Add enough ice to cold water to measure 2 cups. Add to gelatin; stir until ice is completely melted. Refrigerate 5 min. or until gelatin is slightly thickened (consistency of unbeaten egg whites).

MEANWHILE, line bottom of 13x9-inch dish with cake slices. Add sliced strawberries and 1 cup of the blueberries to thickened gelatin; stir gently. Spoon over cake slices. Refrigerate 4 hours or until set.

BEAT cream cheese and sugar in large bowl with wire whisk or electric mixer until well blended; gently stir in whipped topping. Spread over gelatin. Arrange strawberry halves on cream cheese mixture to resemble the stripes of a flag. Arrange remaining 1/3 cup blueberries on cream cheese mixture for the stars. Store any leftover dessert in refrigerator.