As far as I know, there is some consensus on Taylor Swift being IEI. I personally dont have a strong opinion on a type for her, but i dont see why IEI couldn't be the case.
Not a huge fan of her songs, but I saw her perform on the American Music Awards tonight, and even though her voice is weak and out of tune at times, she gives a great stage performance/production--very entertaining. This is why she is a star, in my opinion. It's not because of her voice, for sure.
to update my opinion, I think she is getting better. A lot better. Totally digging her most recent song (Blank Space).
The music video is well done as always...she's always been really good at that, though.