Quick Lemonade Cake

1 package lemon cake mix
1 small box instant lemon pudding and pie filling
4 eggs
1 cup water
1/4 cup oil
1 6-ounce can frozen lemonade, thawed
2 cups sifted powdered sugar
   Combine cake mix, pudding, eggs, water and oil in a large bowl. Blend well and beat for 4 minutes. Pour cake batter into greased and lightly floured 13-by-9-by-2-inch pan. Bake at 350 degrees for 35 to 45 minutes or until cake is done.
   Cool for five minutes. Prick cake with a fork, making sure to push the fork entirely down through the cake. Blend lemonade concentrate and powdered sugar. Gradually spoon glaze over cake until completely absorbed. Cool and cut.