Preheat oven to 350 degrees.
In a mixing bowl, combine flour, baking powder, baking soda, and salt.
In a stand mixer, whisk together butter and sugar until light and fluffy. Stir in above dry ingredients (will turn into a thick mixture).
Add in vanilla, champagne, sprinkles, and milk. Then add in egg whites - one at a time. Stir until well combined.
Fill cupcake liners to 3/4 full. Reduce oven temperature to 325 degrees. Bake for 25 minutes or until you insert a toothpick and it comes out clean.
Once done, allow cupcakes to cool completely before icing.