Preheat the oven to 350℉ and grease and flour a bundt pan.
In the bowl of a mixer, combine the cake mix, pudding mix, vegetable oil, lemonade, water, eggs, triple sec and tequila and mix for 5 min at medium speed.
Pour the batter in the bundt pan and bake for 45 min to an hour or until done, use a toothpick in the center, if it comes out clean, it's done. While the cake is baking, you can make the glaze, so basically add all the ingredients in a bowl and whisk them well, if it needs to be a bit thicker, just add more powdered sugar. Let the cake cool on a wire rack for a few minutes, about 10 minutes, and then remove it from the bundt pan and let it cool completely.
Pour the glaze over the cake and you've got yourself a yummy yummy margarita cake.