Upload & Sell: Off
One can see her expression as a frown if they want, but clearly in the context of the moment it isn't a frown but a very emotional moment for her
It is technically a frown -- that much is not a matter of opinion, but of physiology -- which is why I said it's unfortunate. It is fairly apparent that she's not frowning from anger or displeasure, but rather from a mix of emotions, and likely in an effort to hold back tears.
My point in saying it's technically a frown was not to offer an obtuse misinterpretation of the meaning of her expression, but merely to observe that it's not as pretty an expression to look at as a different facial reaction to the same emotions might have been.
It's mainly an aesthetic matter, and depending on the bride, probably isn't as important to her as it is to a third party who doesn't know her. Some brides are concerned first about how they look, and second about capturing memories, but most would probably be happily transported back to the moment by this image, which is why I'd keep it.