Kelly Clarkson is staging an American Idol Season one reunion on her talk show. According to EW, on September 18th,The Kelly Clarkson Show will welcome original judges Simon Cowell,Paula Abdul and Randy Jackson, along with Season one runner-up Justin Guarini. Kelly and Justin were the final two contestants on the first season of American Idol b ck in 2002. She and Justin later teamed up for the universally reviled movie From Justin to Kelly.Ryan Seacrest, who continues to hostAmerican Idolon ABC, will also join via satellite, according to Cowell, who mock-complained toExtra, “I told him I flew in from London to be there, he stayed in New York.”