Well of course I haven't.
But I was musing with DD this morning and I suggested I might wear my wedding dress to watch the television.
She responded with a 
So, if you were invited, and money was no object, what would you wear?
I think you should stick with the body type you have, although actually as this is fantasy, you can all be blessed with bodies of supermodels if you so desire.
And if you are pregnant, let's have a range of maternity gear, after all, Victoria Beckham might have to choose something along those lines (I do feel for her, invite of the century and v heavily pregnant!, although a lovely DD will no doubt sweeten the pain)