The interestng thing with Charlotte Church will be whether her voice, and more importantly her muicality, develops. The repertoire on her first CD's is not at the demanding end of the spectrum and whilst done well the voice is no more outstanding than many other Girl choristers - but the marketing was superb!
As she grows the challenge will be to keep the voice in shape but also to gain the other experiences which go to make a great singer. As with most (if not all) young musicians the technacal side is easier to produce than the interpretation. The career of the child prodigy seems to be slide once they are no longer young but are competing with others whose technical skills have caught up AND have developed interpretive powers.
All the best