Bizarre Sleep Habits of Some of the Most Successful People

To keep her powerhouse voice in tip-top shape, Mariah Carey insists on, get this, 15 hours of sleep. She also likes to keep things steamy in her boudoir, but not in the way you might think. “Literally, I’ll have 20 humidifiers around my bed,” she said in a V magazine interview. “Basically, it’s like sleeping in a steam room.”