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Wanted 'warm up' before they sing after vocal problems

5 July 2013 Last updated at 07:59 BST

Nathan Sykes from The Wanted is one of a number of artists who have suffered with vocal cord problems over the past few years.

He says his voice is now "better than ever" after having surgery and having vocal coaching.

Adele and Justin Timberlake also faced cancelled gigs and the threat of never being able to sing again.

A top industry vocal coach is blaming punishing tour schedules and poor discipline for young musicians damaging their voices.

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