In 2008, Jay-Z joined forces with celebrities like Diddy, Mary J. Blige and wife Beyonce, to rally support for President Obama during his election campaign. This year, the rap mogul is drawing more attention to the upcoming, November elections with a new public service announcement for and the Vote Again 2010 campaign.

The 30-second PSA was recorded during Jay's headlining set at the Bonnaroo Music & Arts Festival back in June. In the middle of his much-blogged-about performance, the Brooklyn rapper thanked the crowd for making voting history in the 2008 election -- which drew more votes from Americans under 30 than any other election in history. He then encouraged potential voters to continue to "fight for what you believe in."

Watch Jay-Z's PSA for the Vote Again 2010 campaign after the jump.