I don't think you are over thinking. I think it is great topic to investigate.

I find in my adult circle of friends the girls who were considered very pretty during their childhood are more self concious about their looks than those of us who were ugly ducklings. Not sure why that is but I'm sure there is some explanation.

I think it is great to let her explore her ability and interest in the performing arts. Merits in the performing arts are earned by hard work and talent. However, I would avoid the modeling or beauty pagent stuff at such a young age. Just my 2 cents.

FYi I hate it when strangers touch my DD's hair!