Based on this face.
I know it looks like they're mistakes, but it's actually mostly in the original screenshot. I even had to fix some horrible errors that were there.
Despite that, it's still an adorable face, so I felt the need to vector it, because I haven't vectored anything in a long time.
Link to .psd vector file: [link]
update: added the top of her hair (so that it isn't cut off)