Get the hottest celebrity news in pictures, including Ashlee Simpson, Julia Roberts, The O.C. stars and more. By Janice Morris

MOST POWERFUL CAMPAIGNERS

In a final push toward Election Day on Nov. 2, the presidential candidates unleashed their party superstars: former President Bill Clinton and Calif. Gov. Arnold Schwarzenegger. Clinton, who underwent heart surgery six weeks ago, made his first stop for Democratic Sen. John Kerry Oct. 25 in Philadelphia and will hit the Southwest this weekend. It's doubtful he'll cross paths with the Republican Governator, who's due to appear with President Bush in Ohio on Oct. 29.