Originally Posted by Marengo
Martha-Louise's 'egg-celent' outfit for the wedding of Letizia and Fe;ipe comes to mind
That one was definitely talked about by the press. According to VG
(also photograph of the dress) it was voted the most tasteless dress at the wedding, by El Mundo. I think it was such a shock, because she looked stunning at the wedding of Mary and Frederik the week before.
Similarly, Mette-Marit's arrival outfit in Madrid (jeans) was also discussed a lot, both in the press and here.
And then there was the feather-duster Mette-Marit wore to her daughter's christening, which got a lot of criticism at the time, but ended up being somewhat common.