@GodsGrace Yes, both double earrings and ink have become mainstream.I remember the first double ear piercings --- they looked kind of funny.
Now I think they look nice if the right earrings are worn.
And as to girls getting "inked", as you put it, I think it's already mainstream.
I live in small town and many young girls have cute tattoos in visible places. I remember when they used to try to "hide" them because it was just starting to switch from male to female.