Combine cake mix and pudding mix, mix in eggs, oil, water and juice. Beat at medium speed for 2 minutes.
Pour batter into prepared bundt pan
Bake at 350 degrees for 50-60 minutes or until skewer comes out clean.
Cool cake in pan for 25 minutes and then remove the cake from the pan, turn it over onto a wire rack. Return the cake to the pan and pierce with a bamboo skewer. Make holes over the surface of the cake to absorb the glaze you are going to pour over it.
After the glaze has absorbed, turn the cake onto a serving plate. Dust with powdered sugar and garnish with fresh berries.
Combine powdered sugar, key lime juice, water and melted butter and mix until smooth
Drizzle over warm pierced cake and let stand until completely cooled.