You need to start the day before or be like me and always have a pitcher of these ready to go.
1 bottle of 100 proof Vodka (it can be a cheap one)
1 quart of Newman's Own Lime Aid
pour all into a 2 quart pitcher, place in freezer, stir every now and then.
it will freeze to a slushy consistency.
Spoon into 16 oz glasses (about 3/4 full)
float 7up on top and enjoy.