I agree with MorahRach… but the problem with this is that its an extremely difficult challenge to stand up to the pressures of hollywood, and the public media.
Even if it creates a positive atmosphere in the world right now in the future he’s hugely at risk of being influenced by the media and everything that goes on, thereby making a Chillul Hashem later on by not staying frum.
Either way it is cool, and ohr chodesh – the people who think theirs nothing wrong with the idea probably thought it before. People don’t change their minds so quickly… unless they weren’t strong on their opinion in the first place.
With so much out there – matisyahu, judah the macabee, de-scribe, and more… there are plenty of frum people who sing out there in holywood etc the boy actually has more chances than he would have many years ago of making a kiddush Hashem – despite what I said before…