I stay up 24 hours a day, every day. Sleep is for pussies.
But seriously.. I have only stayed up a full 24 hours on one occasion that I can think of right now, which was prom this year. I was at the dance till 12, then played keyboards in a show at after-prom till 4, then went to an after-after-prom party till 7, then Ihop for breakfast, and then went home and crashed at about 9:30-ish.