Treble (singer)
Boys who join a cathedral choir or the choir of a large church will have to work hard to develop their voice and learn to sing musically.  They often start this training aged 7 or 8, and they may only have four or five years before their voice starts to break.  They do not usually become famous as soloists, but the Welsh treble Aled Jones became very famous for about three years and made many recordings before his voice broke in 1987.