Mariah Carey sleeps in a steam room. The five-octave singer dished to V Magazine that she has to sleep in the midst of multiple humifiders in order to preserve her voice.

“Literally, I’ll have twenty humidifiers around the bed. Basically, it’s like sleeping in a steam room. The bed is all terry-cloth, the ceiling is pitched so the water can’t fall on my head, and it drips down to my side, and the TV is behind glass.”