Adele's vocal cord trouble not rare

Why do so many superstar singers lose their voice?

In 2015, rising US opera star Stephen Costello was minutes away from making his Metropolitan Opera debut when he lost his voice. "All of a sudden I did something and my neck got really tight. I remember thinking 'oh my god' - it felt almost like something in my throat had popped", he told The Daily Beast.

"Then I couldn't sing. Nothing would come out. Then, as they were calling me to the stage to get ready and walk on ... my neck went into spasm, my throat and all the muscles around it just got so tight... I could barely talk."