Just lend her your headphones for a day.
She'll emerge a woman the next day.
MUSIC CHANGES YOU.
In Soviet Russia...
LOLOL couldn't resist. Anyhow, I doubt many teens nowadays actually look at quality over quantity. I suppose that even if you manage to get her to A/B/A with your M50, she's going to use the classic, no-answer reply: Beats look cooler.