How often is there a pic of someone sitting there with Ronald McDonald's arm around them and they have that expression? Usually it's a smile or some joke.
To me it looks like someone wanting a picture of her with the statue, but her not really being into it, just doing it anyway.
Considering she doesn't look too happy to be in it, that's probably not her favourite picture of herself. If someone was going to put this picture on a disc image as tribute (immortalize daughter etc) this is a strange choice. It could be a sentimental picture in that it reminds someone of a specific day or event, however the fact that the surroundings have been cropped suggests that the point isn't what was going on but to show what this girl looks like clearly. It has a bit of a "most recent picture" feel to it, which is somewhat creepy.