2006The service is one of the rare occasions at which we see the Queen wear a tiara during the daytime. She may pair different earrings and bracelets with it (here, the Diamond Cluster Earrings and Queen Mary's Chain-Link Bracelet), but she consistently selects the Girls of Great Britain and Ireland Tiara for the job. Her favorite tiara must be a great fit for these types of services, as she's used it for other instances as well.
Click here for 2014's service.
Photo: Westminster Abbey