Girl in Koopa Hat

Isn't my girlfriend just adorable? I'm not sure about the expression. Is it "that was very funny but so stupid that I won't laugh"? Probably my best guess... As for the head gear it's called a "Koopa hat", since it was the first name that came to mind when I saw it. I don't think the Koopas wear anything like it though. In reality she was going to longe one of her horses, and I helped carry a few things.

Done