You’re absolutely correct, Pierre. Princess Caroline indeed wore Princess Charlotte of Monaco’s diamond flower hair ornament/tiara (later used by Princess Charlene on her wedding day) at the 1990 Red Cross Ball:
(Princess Grace also wore diamond hair ornaments for this event, see the cover from the late 70s at the bootom.)
--Previous Message-- : I seem to recall Carioline in the late 80's or : early 90's wearing what looked like a : turquoise and diamond tiara (or head : ornament) for this ball. I remember she : looked very glamourous, but it is the only : recollection i have of a tiara at that ball. : : --Previous Message-- : In answer to the query on Tiaras at the Red : Cross Balls in Monarco. No, tiaras were : never in evidence. The late Princess Grace : wore extremely elaborate coiffeurs created : by Parisian hairdresser Alexandre, in the : 60's & 70's era. The August 1968 Ball is : an excellent example. : : :