In a "Point De Vue" issue some time before Prince Nicholas and Tatiana's wedding I saw an article about the probable tiaras that could be worn by the future bride. Among all the well known options of tiaras used by Greek Royal Princesses, such as the Khedivé tiara, the corsage pearls and diamond tiara but also the "disappeared" diamonds tiara (recently reappeared)and.....the little diamonds stars tiara used several times by Princess Catherine of Greece, Lady Brandran, and maybe by Princess Irene?
Here is the only two photos I have of this stars tiara (on the right of the photo):