Barbie wrapped in a Manchester United footie scarf—pinned, scarred and misshapen, like a memento left behind by a vengeful sorceress going at a voodoo doll—is your Exhibit A. It shares space with things you would deem to be part of the normal, reassuring ecosystem atop an urban teenage girl’s chest of drawers: a Harry Potter collection, a high-end Bose Bluetooth speaker set and bobble heads of Beyonce and Kim Kardashian. What gives? What brought this turn to the macabre in this regulation picture of girlish innocence, with its coy aspirations to ideals of beauty?