Peach's Crown

Princess Peach's Crown is a crown always seen on to of Princess Peach's head. It is her emblem and a symbol of the Mushroom Kingdom. Princess Peach is typically seen wearing her crown. Once a year, Princess Peach is recoronated with this crown so that she may remain the princess of the Mushroom Kingdom for another year.

Nintendo Comics System
In the Nintendo Comics System issue Cloud Burst, Princess Peach has lost her crown and needs it to be recoronated so she sends Mario and Luigi to retrieve it. She believes King Koopa to have stolen it as he is invading "World 3". In reality, it was stolen, along with King Koopa's crown, by a Lakitu and the plumbers eventually get it back for her.

''Super Mario RPG: Legend of the Seven Stars
In Super Mario RPG: Legend of the Seven Stars, Princess Peach loses her crown during her wedding to Bowser and Mario has to find it. Mario eventually finds the crown on top of Booster's head. Depending on how fast Mario finds this and a bunch of Princess Peach's other items, either he, Booster or Bowser will receive a kiss from Peach (if he does it very slowly, Bowser will receive a kiss from Booster).

Trivia

 * Toad Guards feature a picture of Peach's crown on their shields in Super Mario Galaxy.