First of all, it better be a large lotto jackpot like 100 mil and up.
To be completely honest I would not spend it on anyone else, don't get along with my family and I'm single so it would be spent all the money on ME. Don't ever want kids so I won't have to spend any of that on them. It will be all mine, every single penny of it.
Of course I would get a financial adviser and invest and make the money work for me so I could live off the interest. I would never work for money again, I would make money work for me.
I would buy a mansion somewhere along the beach, of course it has to be a mansion and worth a few mil. I am not living in a shack. I would also purchase a new vehicle for myself, probably a Bentley. And then I would pretty much buy whatever I want but within in reason so I don't end up like MC Hammer.
I am not going to lie. I like to show off. I like to be gaudy. I like designer and luxury goods, but I'm not going to be like one of those people who are going to end up broke because I know how to manage money and I know my limits. I'm not "too gaudy" but I'm certainly not a modest super humble person.
I will use the money to invest to ensure that I will ALWAYS be rich in the future and will live in wealth and splendant luxury until I die.