Weird fact: Mariah Carey sleeps about 15 hours a night. That’s about double the recommended minimum. The Grammy Award-winning pop siren snoozes more than half the day away for one reason and one reason only: so she can hit her ear-piercingly high high notes. Apparently it works, mostly. “I’ve got to sleep 15 hours to sing the way I want to,” she once told Interview magazine. Call it crazy. We call it career insurance.
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