Fill two ice cube trays with lemonade. Freeze until solid. Once frozen, put the ice into a blender with 2 ounce of lemon vodka and 1 cup of limoncello. Blend until smooth.
Rub a lemon wedge along the rim of the serving glasses and dip the lemony glass rim into sugar to rim with sugar. Fill glass with slushy. Garnish with lemon wedge. Enjoy!