Mariah Carey wants a voice machine like Stephen Hawking.

The "Fantasy" singer, who has to stop talking for two days before a big show to give her voice a rest, believes a "robot voice" machine similar to the one used by the paralysed scientist would be useful.

She said, "Before a big show I have to do 'vocal rest' where I'm not allowed to speak for two days. It's so boring having to write notes to everyone! I need Stephen Hawking's voice machine for when I'm on vocal rest."

"I'd like a machine where I can just think and it comes out in a robot voice - that would be amazing!"

The 37-year-old musician also revealed her unique singing voice is down to nodules on her vocal cords.

She added to Q magazine, "One of the reasons for my voice is I have nodules on my vocal cords. My mother says I've had them since I was a kid. That's why I have the high register and the belting register and I can still be husky."

"The only thing that really affects my voice is sleep. Sometimes if I'm exhausted I can't hit the really high notes."

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