I'd be inclined to see such cultural behaviour in terms of the simple innocence of childhood play and the acquisition of cultural understanding than anything sexual per se. In fact, a little girl dancing to Karoake is no more sexual than the same kid gearing up to motherhood by playing with her dolly. I wonder does anyone get outraged by little girls pretending to be mothers - apart from those irate feminists who see such play as enforced stereotyping? The intention is always innocent (be it on the part of the kids or their loving parents & carers) - the perception on the other hand(as displayed in the overall tenor of this thread) is invariably somewhat less so.

Little girls will always desire access to the dances, fashion, make-up, of the adult world but this in no way sexualises them, or yet makes them vulnerable to paedophiles who are increasingly, and rightly, reviled and persecuted. So nothing to do with porn or sex, just kids empowering themselves through play just as kids have always done.