I think Justin Bieber is a really good singer and that he should keep his "cute boy" look.
A lot of people are giving Justin shit because he is 16 but looks younger. I think that he has a benefit of looking younger because he is appealing to younger girls who will do ANYTHING to meet/see him; and he will look younger when he's older. (I have the same issue like Justin, I am also 16 however people think I'm 14 >< I hate when that happens! I feel for you Justin).
As far as Justin's singing, WOW! He is extremely talented and should always be singing.
never say never