Claire Boucher aka Grimes

Yeah, I'm leaning more towards Fe/Ti. Her smile looks a little more like an Fe wide smile than an Fi snarl (although, I may be wrong, because I'm not sure if I'm seeing tension in her cheeks or not). Also I don't really get that dismissive Te feel from her. It's hard to see her hands, but you kind of get a look at (what I think is) Ti soft wrist/tense fingers in the first video at 1:58.

Perception functions I'm (even) less sure of. I could honestly go either way for them. Definitely looks like a PeJi, though. She's (apparently) described her music as "ADD music" and goes through different periods of interest and whatnot, which is (to an extent) generally associated with Ne, but that may just be an element of being Pe-dominant.

From her wikipedia page: "At age 18, she moved to Montréal, Québec to attend Montréal's McGill University, studying Russian literature and later, neuroscience."
My god, I think I'm in love. Also I gave her music a listen and overall I like it.

I think she's a PeJi because she has a lot of momentum. She cannot stay still. I'm seeing Fe/Ti now too. I also thought Ne for a moment because she seems to be hyperactive (cannot stay focused in one place, ADD), but even so, her eyes have a penetrating momentary lock-on quality.

This is interesting. I've seen more than one person who have some Fe-like features but otherwise seem Fi. The lines from the mouth to the nose looks Fi-ish but if you look at the third clip in the original post for instance, she kind of partly has a tension in the smile that looks Fe. I wonder what that means. That tension reminds a little bit of Rupert Grint by the way, who have been typed as a PeFi (NeFi to be specific) - and he looks even more Fe-ish in his smile peculiarly enough.

EDIT:

Just saw that DJArendee does something similar: