The Voice coach Keith Urban knows just how tough music judges can be - he was told to ditch his country sound and learn to sing in tune after appearing on a talent show when he was nine years old.
The country music superstar appears on the Aussie version of the hit music talent show, and is desperate to give budding singers helpful advice after suffering some harsh criticism when he appeared on TV show Pot of Gold in the 1970s.
The 44-year-old singer recalls, "He said 'I desperately encourage you to escape the mediocrity and get out of country and western and get into some real music. Otherwise you'll end up sounding like Dolly Parton and be absolutely useless.' So that obviously had a big impact on me! And then he said, 'Kindly learn to sing in tune because you are intrinsically a good musician.'"
After having a music career that spanned five decades and saw the release of over...