1. Go to a Brazilian proxy like:
brazilunblock.info OR brazilsurf.info OR brazilproxy.com OR freewebsurf.info
2. Paste the link into the blank box of the proxysite
http://www.stardoll.com/en/contest/view.php?id=2899
3. Click Go or just hit Enter on your keyboard
4. Log into Stardoll
5. Complete the quiz with random anwsers and click Enter Competition button
6. Wait till page loads. You should see 'Your contest entry has been submitted' text.
7. You can now leave the proxy and go to Stardoll as usual
The decoration should be in a Starplaza box in your suite.