Yes, what happened to her hair
Her skin looks awesome but the hair
She did it for the punk-themed Met Ball, I don't think she kept it like that. At least I HOPE to all Hell she did not
Girls, I think that is just babypowder. You wash it out before you go to bed. Karl Lagerfeld also used to wear his hair like this for years, but just with powder in it, not any longlasting coloration.
If it's not powder, it is some sort of coloring hairspray people use for carnival and stuff. You can see that small parts are left out and that her real color shines through in that picture where she turns her back.