-If you live in Brazil, Log in and Enter contest by going here http://www.stardoll.com/en/contest/finish.php?id=1351
-If you don't live in Brazil
1)Go to Brazilian proxy: 
brazilsurf.info/ OR brazilunblock.info/
2)Paste stardoll link in the Web Address box of the proxy
http://www.stardoll.com
3)Click GO
4)Log in stardoll
5)Copy and Paste the contest link in proxy Address bar: 
http://www.stardoll.com/en/contest/finish.php?id=1351
6)Wait till contest pages loads
7)Leave the proxy, Go to stardoll as usual
Guitar should be in a Starplaza bag in your suite [:
Available till 17.07