I've just stumbled across this thread and thought it looked like fun, apologies for turning up late to the party.
For my pre-coronation banquet, I would wear this
Elie Saab gown with the Norwegian Diamond Daisy Tiara.
For the coronation, I would wear another Elie Saab gown, but in a different colour.
The music would include Handel's Zadok the Priest, My Hear is Inditing, Purcell's Trumpet Tune, some of the music Handel composed for the coronation of George II and Mendelshon's (sp) Lift Thine Eyes.
If dreams were real...