not a surprise that they all do shoots like this. Kob or noon wouldn't surprise me at all if they were to do it. It's so common nowadays even the loooking conservative people. Thailand is no longer conservative like b4 and it's not a bad thing. In fact, every country is trying to be like American.
i think it's the lighting that make her look dark although she does have a tan, but it's also the lighting and stuff. The last pix is the best. At least, she is one of the few that go for a tan. Even with the tan she is not as dark as in the pix. Plus, it is that metallic thing and the camera/light/watever that make her look darker than her already tan body.