UPDATE: Dress was recieved in suites today 1/4/11
Im not in Stardoll Royalty, but a way you join in is by buying a Superstar Membership for a full year.
Heres a Update from Stardoll Insiders:
Remember the free dress all royalty members were promised as part of the 12 days of dresses campaign? . Stardoll has sent a letter out to all royalty members but when you click the image it does not send you the dress. At least we know they haven't forgotten about it and that it's coming really soon. (If you haven't got the letter and you are in stardoll royalty, log out and in, it worked for me).