Oh, I loved the 1920s and 30s wear-your-tiara-on-your-forehead-look! I prefer more natural looking hairstyles and Queen Astrid wore her jewelry that way and she always SHONE.
Whoever put the fringe tiara on Alix that day maybe was blind or nearsighted because usually it looks wonderful, but not when appearing as crooked teeth. I don't mind the Norwegian emerald tiara, but the huge emerald on top could stand to find another placement.
Oh- and the words button and tiara should never, ever describe ONE OBJECT!!!
Camilla did have precedent for her wheaty hair hat thing; Marina's bridesmaids wore something similar.