What is the best way to get votes for online contest?

[bl4ze]

I recently entered a poster design contest for NAS' New Years Eve show at Radio City Music Hall. The voting structure is open to the public and you can vote via Facebook or Twitter. To me this doesn't seem like a fair way of choosing the "best" submission but those are the rules.
Between FB and Twitter I have roughly a couple hundred friends/followers and most of them are the same people.

So my question is, with approximately 5 days remaining in the contest, what would you guys recommend as far getting more votes for my submission? Any suggestions would be much appreciated. Thank you for your time.

Here is the link to my submission as well as the contest invite:

http://www.talenthouse.com/creativeinvit...c2836b/816