Leonardo DiCaprio, Jennifer Aniston, Jamie Foxx, Usher, Halle Berry, Forest Whitaker, Sarah Silverman, Dustin Hoffman and Jonah Hill are just a few of the celebrities who are urging Americans to get out there and vote in a new public-service video entitled "5 Friends."

The spot does not single out a candidate but features the stars urging people repeatedly to register and vote (and encourage five friends or more to do the same). In some states, the voter-registration deadline is October 4, while other states allow people to register at the polls.

The PSA urges people both registered and unregistered to spread the message of the upcoming voter-registration deadlines. The message, which also includes Ashton Kutcher, Demi Moore, Eva Longoria, Ellen DeGeneres, Will.I.Am and Tobey McGuire, initially shows the stars saying, "Don't vote, who cares?"

It then features the stars naming issues — women's rights, civil rights, the economy, global warming and more — which voting can have a profound influence upon. And there's a friendly reminder that you must register before you can vote: "Register to vote or you have no choice."

The clip then lists a Web address at which viewers can register, and the celebs then "wait around" while viewers do so. To pass the time, Sarah Silverman even takes off her bra under her shirt, which, along with occasional swearing from some stars, distracts a bit from the seriousness of the PSA's message, but not from its point.

Get informed! Head to Choose or Lose for nonstop coverage of the 2008 presidential election, including everything from the latest news on the candidates to on-the-ground multimedia reports from our 51 citizen journalists, MTV and MySpace's Presidential Dialogues, and much more. Plus, check out Think's voter-registration page to find out how you can hit the polls in November.