Her teeth
They're big and perfect, almost beyond Hollywood or Photoshop smile.
Completely white, nothing too big or out of proportion in any way.
I do, however, think she owes it probably to bleaching/whitening.
They're "just a tad" too white and it's by no means possible to compare whiteness of teeth of common mortals, even if they are 100% healthy, beautiful and without any stains, with her pearls.