Voted.
It is prohibited to vote more than one time within 24hrs, because they check your IP address. I think it will be possible using free proxy servers. If so, Jennifer will receive much more votes during a short time. I'll check it in the evening and get back with the outcome.
So, there is a way to add more votes from one computer within 24 hrs. The only thing you should have is several email accounts. It is easy to create them in gmail. If you want to add more votes and not to wait for tomorrow then you should do the following.
You should keep in mind
1. you should use a new free proxy to add a new vote
2. you should use a new email account to add a new vote
3. you can help Jennifer to receive a car