First this was only available for Superstars because the Sulaf Fawakherji contest was ss-only, but now it's non-ss!
So non-superstars can get it aswell:
1. Log into Stardoll.2. Go to http://www.stardoll.com/en/contest/view.php?id=547
and dress the doll up and save her in your album
OR if you don't want to dress her up: