Who: Charlotte Casiraghi of Monaco.
When: Tuesday, April 5.
Where: The Montblanc 110th anniversary gala dinner at the Rainbow Room at Rockefeller Center.
What: A gold brocade Gucci gown with Montblanc jewels.
Why: Casiraghi's choice of attire was perhaps a reasonable one, given that she's both Montblanc ambassador (along with Hugh Jackman) and a Gucci equestrian ambassador. In a crowd of red and black (the Montblanc "Rouge et Noir" collection served as both the repeated mantra and wardrobe preference of the night), her silver and gold look made it apparent royalty has no dress code.