If you are from the UK just join THIS CLUB. If you are from anywhere else you will need to use a manual proxy as that is the only way to join a club. Set your manual proxy to 87.98.254.226 port 3128 or find more HERE. Thanks to BIS for proxy.
For instructions on how to use manual proxy click here.

UPDATE: Here's more working manual proxies, thanks HTGF!
IP Address: 77.95.34.218 Port: 80 OR
IP Address: 146.101.133.34 Port: 80 OR
IP Address: 109.123.110.15 Port: 80 OR
IP Address: 87.237.62.174 Port: 3128 OR
IP Address: 82.21.208.175 Port: 8080

Go to this website once you're in the manual proxy:

http://www.stardoll.com/en/clubs/home.php?id=2774003

Log into stardoll. Join the club by clicking 'join this club' then 'yes'.

Once you have joined the club the dress should be in a bag in front of your closet.

Emma xox