For some reason I can't think of any tags that would effectively describe this emotion/pose.

I can. She obviously has brain freeze.

She's been listening to too much Jpop.

Looks beautiful, anyone know the artist?

Eating ice-cream too fast and whatnot.

How about these:
Terror, terrified, angst, fear, anger, horror.

Despair?

MisterFox said:
Terror, terrified, angst, fear, anger, horror.

piespy said:
Despair?

Her eyes don't match those

she's thinking so much.

she's got that "oh shi- i forgot....." look to me.

That, or she's keeping her wig from being blown away.

She looks as though she's just beeb given some form of bad news and is in the prosess of falling to her knees, gripping her hair in despair... though she kind of looks almost angry too... what am I saying... I have no idea.

It's a nice puzzle, I'd like to hear from the artist.

more like artist sauce plz

I wish I had an artist source, but I think this one came from 4chan, unfortunately. I do really like it though.

Shinjidude said:
For some reason I can't think of any tags that would effectively describe this emotion/pose.

I'd call it "headache".

Gah, I tried to use Tineye to find the source of this pic, and it gave me this!: http://ruliweb2.empas.com/ruliboard/read.htm?main=cmu&table=cmu_yu&page=1&left=h&db=3&num=94296