Some Idol magic at Coca-Cola 600

American Idol host Ryan Seacrest, left, challenges NASCAR driver Greg Biffle, center, in a driving simulator prior to the Coca-Cola 600 race at the Lowe's Motor Speedway in Concord, NC., Sunday, May 29, 2005. "American Idol" contestant Jessica Sierra, of Tampa, Fla., signs autographs for fans prior to the Coca-Cola 600 race at the Lowe's Motor Speedway in Concord, N.C., Sunday, May 29, 2005.