The Florence and the Machine singer feels "special" when she realises she has stayed awake for over 24 hours but knows the feeling won`t last for long. She said: "My favourite mode of being is having not slept. "You know when you`ve been at a party and the dawn rises? Everything seems to be really open. "The reason why it`s so special is because you know that it`s going to crash. "As soon as you go to sleep, you know everything will be reset double and work will be double. "You`ve had that one day when everything is glorious and you know everything is going to be doubly difficult afterwards." Florence also recalled a dream she had about her late grandmother, admitting she was surprised to receive "practical" advice in her nocturnal vision. She told Britain`s Vogue magazine: "It was the first time I`d seen her since she died when I was 11. I was having a regular dream and then she was just there. "There`s this amazing Thom Gunn poem about seeing a dead lover in a dream, and he says it was as if death was undone. "That was what it was like. I threw my arms round her legs and she actually said, `Concentrate`. It was strangely practical advice for a dead person."