Bluesy English teenager Joss Stone was among the celebrities who helped put the "rock" in Rock the Vote at the organization's 2004 campaign kickoff Wednesday.

Stone performed at the Los Angeles unveiling of the bus at the center of Rock the Vote's 2004 "Get on the Bus" tour, which will hit 50 cities over the next five months. Actresses Jada Pinkett Smith and Eliza Dushku were also on hand for the ceremony.

That evening, Rock the Vote hosted a party at the Avalon club, where Snoop Dogg, Nate Dogg and Warren G's 213 performed (see [article id="1486950"]"Snoop's 213 Get Wrong Number While Doing Things The Hard Way"[/article]), along with Stone, Ozomatli, Kate Hudson's cousin Sarah Hudson, and Pinkett Smith's band, Wicked Wisdom.

Adam Brody and Rachel Bilson of "The O.C." and the Wu-Tang Clan's RZA made appearances, and Maroon 5, who weren't scheduled to attend, took a break from shooting a video next door to show their support.

Working in cooperation with MTV's Choose or Lose campaign, Rock the Vote wants to mobilize 20 million voters by Election Day. The organization hopes the bus tour -- which will be accompanied by concerts and other events along the way -- will get young people "inspired by artists, issues at stake in the election, and ultimately by each other," Rock the Vote President Jehmu Greene said.

Riding on a bus emblazoned with a fist wearing a four-finger ring that reads "VOTE" in silver and diamonds, the Rock the Vote team will hit the most hotly contested cities, including Boston during the Democratic National Convention, New York during the Republican National Convention, and Miami for the first presidential debate.

The tour will feature performances by Q-Tip, the Donnas, the Black Eyed Peas, the Dixie Chicks, Maroon 5 and Alanis Morissette, among others.

Find out when the Rock the Vote bus will be in a city near you and how to get involved at ChooseorLose.