She was the original out-to-shock, 'sex sells' pop star.
She started what we all see as normal/banal now. Pretty much all female pop stars are basically a rip-off of her. With the exception of, umm ... Lorde...? ... everyone else has just copied Madonna. Miley is the most pitiful of the lot - I mean come on, Madonna was doing it better 30 years ago.
Not saying I admire it, but fair play to her for keeping on. She's still garnering publicity, so it's working.