[user104658]

Shouldn't have under 18's at all in my opinion, very few are emotionally mature enough to handle the pressure of the show and the aftermath, even if they win. Also, a singer who is good at 15/16 is only going to be much better if they spend a few extra years honing their skills before attempting to get somewhere with them. The X Factor is constantly doing this. Getting these kids too young and wrecking them before they had a chance to develop their own identity, at which point they would probably have done much more.