Who was Sunday's Coachella headliner? The band that played last, to wrap up the weekend on the main stage? Or the act that drew probably the weekend's biggest crowd, and certainly its most fevered rush of fans?
If the answer is the former, it's indisputably Arcade Fire, which closed out the festival with a set drawing from the downtown disco of its latest album "Reflektor." But if it's the latter, then it's probably Calvin Harris, the Scottish EDM producer whose main stage set around 8 p.m. drew an instant crush of ravers who practically vacated the rest of the festival.
Or it might have been the English neo-house duo Disclosure, whose sprawling Outdoor Stage set absolutely beat Arcade Fire's in numbers during the few songs the two overlapped (and more to come on their set, which featured a cameo from Mary J. Blige, later).
The true headliner Sunday was dance music in general, which should be cause for reflection about how Coachella organizes its top billings in the future.