Prepare and bake cake mix using package directions for two 9-inch cake pans. Remove to wire rack; cool. Split layers horizontally into halves. Combine yogurt, lemonade concentrate and condensed milk in bowl and mix well. Spread 1/4 of mixture over 1 cake layer. Stack cake layers with fruit between, alternating kiwifruit and strawberries and spreading 1/4 of lemonade mixture over each cake layer. Mixture will run down side of cake. Decorate top of cake with concentric rings of remaining fruit. Chill until serving time.