Mix cake mix, eggs, water, oil, and lemon juice in large bowl. Fold in lemon frosting.
Pour mix into bundt cake bake for 45-50 minutes, or until toothpick comest clean. Remove from oven, and letcool slightly. Place on platter or cake plate, and use toothpick to poke holes all throughout the top of the cake.
Mix powdered sugar, water, lemon juice, and butter together well til smooth and creamy. Pour glaze all over the warm cake, making sure to allow glaze to seep into premade holes. Let cake andglaze cool, and serve.