Soul star John Legend took secret voice coaching lessons to help him get through live shows.
The singer, who is famed for his smooth, soulful voice, admits he turned to a vocal expert after experiencing problems onstage.
He reveals, "I was having trouble making it through my shows, singing the songs the way I sing 'em.
"I sing 'em so hard, and I go hard every night and give that passion and I was killing my voice.
"I had to learn how to fix that and sing better and more healthily in a way that could sustain itself over a long period of time."
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