The butt-wiggle shows off the dress nicely, but not you - you're somewhere in there, but who can tell?

As for the formal, heck with demure. That photo has cleavage. And boobies = universal acclaim. (The Vamping photo in the same series is even better, I think. Did people ignore that one, or did they not see it?). Also, because of the glasses and the shadows, in that one it looks like you _might_ be looking up from under the glasses, in which case it's seriously sultry, and not even close to demure.