Here are some details.

Three buttons below where you have the option to cast your vote: Mixi,Facebook and the Blog ( Live door )
For each site you must have an account to vote.
The deadline for voting is on December 13. The planned announcement of winners via UStream will be on the next day Dec. 14.

If you will click on FACEBOOK, you will then be directed to the page below

Just click on the button below Supernova’s icon, and your vote will cast automatically.

source: Tower records Japan

From : Starlight