Actor Michael J. Fox, right, and Gen. Wesley Clark, applaud during a campaign rally for Democratic senatorial candidate Jim Webb, Thursday, Nov. 2, 2006, in Arlington, Va. Fox's support of candidates who favor stem-cell research set off a firestorm when conservative talk-show host Rush Limbaugh accused him of acting. While Fox has been tireless in his campaigning, he is not the only celeb on the campaign trail.
Brad Pitt
Actor Brad Pitt, center, arrives at a news conference showing his support for Proposition 87 oil tax, at the County Federation of Labor Headquarters in Los Angeles, Monday, Nov. 6, 2006. Proposition 87 is a California ballot that would tax oil to fund alternative energy research.
Eva Longoria
"Desperate Housewives" actress Eva Longoria speaks at a Yes on Prop. 87 rally before introducing former President Bill Clinton in San Francisco, Wednesday, Nov. 1, 2006. The proposition to tax oil and fund alternative energy has unleashed a bitter state fight with many celebrities speaking out on it.
Robert Redford
Actor and director Robert Redford, left, and Dr. Susan Sprau, right, a volunteer with the American Lung Association, attend a news conference Wednesday, Oct. 25, 2006, in Los Angeles, in support of Proposition 87, which would tax oil production in California to raise $4 billion for alternative fuel research.
Ben Affleck
Actor Ben Affleck speaks with reporters Friday, Nov. 3, 2006, on the University of Connecticut campus at Storrs, Conn. Affleck was making an appearance on behalf of Joe Courtney, left background, who is the Democratic nominee for Congress from Connectcut's 2nd District. In center is UConn head mens basketball coach Jim Calhoun.
Jennifer Garner
While Affleck was stumping for candidates in the Northeast, his wife, actress Jennifer Garner, stuck closer to home, taking part in a rally for Jerry McNerney, Democratic candidate for California's 11th Congressional District, Nov. 4, 2006, in Pleasanton, Calif. Appearing on behalf of the Defenders of Wildlife Action Fund, Garner is part of an effort to unseat Rep. Richard Pombo, R-Calif., in Tuesday's election.
George Clooney
Actor George Clooney, left, and his father, Nick, take part in the filming of a public service announcement that features the Clooneys, Don Cheadle, Alfre Woodard, Julia Roberts, Toby Keith and others. ONE.org's television spot urges viewers to vote to fight global AIDS and Third World poverty.
Bonnie Raitt
Singer Bonnie Raitt performs at a Yes on Prop. 87 rally in San Francisco, Wednesday, Nov. 1, 2006.
Brandy
Singer and actress Brandy Norwood, right, encourages Jonathan Smith to register to vote Sunday, Oct. 1, 2006, in McComb, Miss.
Willie Nelson
Independent gubernatorial candidate Kinky Friedman, left, and country singer Willie Nelson make a joint appearance at Nelson's ranch in Spicewood, Texas, Saturday, Nov. 4, 2006.
Suzanne Vega
Singer Suzanne Vega performs for the crowd during a Save Darfur Coalition rally in New York's Central Park, Sunday, Sept. 17, 2006. Demonstrators called on the United Nations peacekeeping force to be immediately deployed to the Darfur region to stop the genocide.
Al Franken
Comedian and author Al Franken rallies DFL supporters around 1st District Congressional candidate Tim Walz, Sunday, Nov. 5, 2006, at the Union Center in Albert Lea, Minn.
Maria Conchita Alonso
Cuban-Venezuelan actress Maria Conchita Alonso appears at an event in support of foster care on Capitol Hill in Washington, D.C., Tuesday, Oct. 3, 2006. Alonso has been outspoken in her support for Venezuelans to vote President Hugo Chavez out of office.
Mira Sorvino
Actress Mira Sorvino speaks before a hearing of the House International Affairs Committee on the crisis in the Darfur region of Sudan Sept. 20, 2006, on Capitol Hill in Washington, D.C. Sorvino attended the hearing which spotlighted how the efforts to bring peace to Darfur have given way to escalating violence and a worsening human rights crisis.
Leonardo DiCaprio
Actor Leonardo DiCaprio, a noted environmental activist, rallys for Yes on Prop 87 at the California Democratic Westside Office on Nov. 5, 2006, in Los Angeles.
Jewel
Singer Jewel speaks at a press conference hosted by Lifetime Television's "Stop Breast Cancer for Life" public awareness campaign Sept. 20, 2006, on Capitol Hill in Washington, D.C. Jewel joined the group in delivering more than 12 million petition signatures to Capitol Hill to urge Congress to pass legislation to end the practice of "drive through" mastectomies.
Darryl McDaniels
Singer Darryl McDaniels of Run DMC speaks during the Congressional Coalition on Adoption Institute event honoring "Everyday Angels" Sept. 20, 2006, on Capitol Hill in Washington, D.C. The coalition is dedicated to raising awareness and easing barriers for the tens of thousands of orphans and foster children in the United States.
Steve Buscemi, Moby and Lou Reed
Actor Steve Buscemi talks with musicians Moby and Lou Reed at MoveOn.org's "Call For Change" on Oct. 14, 2006, in New York. The liberal political organization is aiming for 5 million phone calls to 5 million voters targeting the 30 hottest House races in the nation.