For Brazilian residents log in and click here: Natura Faces campaign
For other countries:
1. Go to a Brazilian proxy like brazilproxy.com or brazilsurf.info
2. Paste http://www.stardoll.com into the URL box of the proxy and click Go
3. Log in to Stardoll
4. Paste www.stardoll.com/en/do/campaign/naturafaces2012.php?item=1 in the URL box of the proxysite and click Go
5. When the page loads you should see a Facebook page
6. Leave the proxy and enter Stardoll as usual
The dress should be in a pink bag in your suite