Amelie Virginie was the princess of Genovia of twelve days before she died of the black plague. Before she died, she made a declaration that Genovia was a democrachy. But after her death her uncle who succeded her burn all copies he could get. One copy however was hidden in Amelie's portrait, until Mia Thermopolis finds it and makes it public.
Her tiara was found and was given to Mia on her 18th birthday.