Earlier in the month, the community rigged the voting system for the Justin Bieber My World Tour Contest, where fans are supposed to vote for their country to get Bieber to come and perform a concert. As of today, North Korea is leading the contest, although it is likely the votes will be tossed out and Israel will be the real victor.
The hack involved using a vulnerability in the site's comment system.
Explains Mashable: "The bug allowed users to inject HTML (the code that most websites are built with) that could be executed on the site, whereas HTML within comments is supposed to be restricted. The hackers did everything from force pop-up messages to appear over the site declaring that it had been hacked to redirecting Bieber video pages to sites hosting pornography and malware."
Google disabled comments and corrected the bug within two hours.