I'll go a bit more "in depth" then with the original recipe, and throw in the Grand Marnier for extra points
Grey Goose Citron Vodka Slushie
3 cups Grey Goose Citron Vodka
1 cup Lemon Frozen Drink Mix
Ice if making in a blender, water (as directed) if not making slush
Mix vodka and lemon mix. It helps to chill the mix before putting in a blender. Add the required amount of water for your mix as directed on the can or package. If making in a blender use enough ice to produce the slushie effect. Frozen Minute Maid lemonade works well from my experience.
Grand Marnier Orange Slush
3 cups Grand Marnier
1 cup Orange Fruit Smoothie / Orange Dreamsicle
Same instructions as for the Lemon Slush.