No one takes Christmas more seriously than Mariah Carey. 
The “All I Want For Christmas Is You” hitmaker has turned the holiday into a cottage industry, with concerts, TV specials, even McDonald’s menus centered around her love for all things merry. That festive fervor spills over at home, too. 
“When I’m not on stage and I’m in holiday mode, there are rules that I set,” Carey says. “I don’t care who it is – the kids, if I have guests, whatever – nobody is allowed to play or watch anything other than a Christmas-related thing. If I wake up in the middle of the night and walk into the living room, and the music isn’t playing and the lights aren’t on, I just can’t handle it.”

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