Leona Lewis is so terrified of losing her voice while performing, she refuses to speak for days before she takes the stage.
The Bleeding Love hitmaker goes to extreme measures to ensure she keeps her vocal chords in good shape.
And the pop star even abstains from speaking in a bid to ensure her pipes are ready to belt out the high notes.
She explains, "Before a big show I have to do 'vocal rest' where Im not allowed to speak for two days.
"It's so boring having to write notes to everyone. I'd like a machine where I can just think and it comes out in a robot voice - that would be amazing.
"I get scared of things not panning out the way I want them to. I wonder what I'd do if anything happened to my voice. Thats why I look after myself so much."
And the British singer admits the ritual has an effect on her social life: "I'll say, 'I cant talk to you for long', and 'I cant do this or that because Im doing a show'.
"I'll miss nights out because I can't be talking over loud music. I get panicked in case something happens.