Because she don't pretend to be a living piece of art or something like others do. She blends musical genres very good.
at the ones saying she always follow trends. How was Diamonds a trend? How was Stay really a trend when the last succesful piano ballad was released almost an year and a half behind?(Someone Like You).
Why do you except from Right Now to smash when it didn't had promo?(before you come and say that the song it is in the Budweiser comerical, that comercial was released 2 days before RN hiting 52 on Hot100, which is pretty good, seeing other singles from other artists struggle with lots of promo).