Who in the world coached her to make that big open mouthed smile? I’m willing to bet there was a focus group of some kind. Imagine how bad her other smiles were to land on that.
I do not know, but I agree she was definitely coached to do that, because she definitely is not doing that now, and there is no one taking pictures of her not doing it either.
She’s made many public appearances since her epic, crushing, total defeat, and I have not seen this facial expression at any one of them.