Well, it may be time to admit that I have a new set of people to add to the Emma Cannot Distinguish Human Faces list and it is Lana del Rey and Marina Diamandis.
(The list was previously topped by Leonardo diCaprio and Matt Damon; I am one of the people who saw the Departed, and did not realize until the end credits that there were two actors in the movie. In my defense, I was distracted. In my not defense, this problem also came up with Inception and True Grit.)