I don't quite understand threads like these. They ask "am I too old" making this question seem a valid consideration, and then if anyone says yes people are up in arms. Those up in arms are all there are no rules and "wear what you want" and yet every second comment is about whether you have the correct figure and weight to carry it off. So very conforming really when it comes down to it.
I don't see why age is anything to do with whether or not you wear the dress. It says a bit OTT and celebratory to me! So I do actually agree with the poster noone else can understand that the glammed up look is best if with a large slice of irony, self-knowingness, fabulousness, or just with total enjoyment. What I understood from the post was that trying to be glamorous without any signs of fun or excess is not fun and what's the point? Like if someone was wear the kind of clothes they used to wear in soap opera Dallas whilst taking it all very over-seriously.
I think you will look great. Go for it. Don't even ask the blinking question. I don't see why it makes any difference what your figure is either. It's about if you have the chutzpah and confidence and look good in it. I get the feeling from your posts that you do have chutzpah and confidence and style so I reckon you'll look great.