One of the reasons I arrived at E was because in the interviews I've been listening to she repeatedly talks about how she has to write her feelings out before she's completely aware of them in her song-writing.
So I figured Ne dominant. Does Fi work like that? I could be projecting the Ne I see, I guess.
Also, a lot of her biography reminded me of Keirsey's "Champion" descriptions; she's most definitely a "champion" of her various causes.
It's impossible to completely tell, though. But I strongly sense at least NFP either way.