Just two weeks after Paula Abdul departed the judge's seat on American Idol, and the show has named more celebrity guest judges–former winner Kelly Clarkson and Joe Jonas. Previously announced guests include Shania Twain, Victoria Beckham and Mary J. Blige. Meanwhile, Simon Cowell has spoken out for the first time about Abdul's departure. “I didn't want to get involved because it wasn't really any of my business. I always thought she was the heart of the show," he told Fox News, "you've taken that away so it's a different show.” (Photo: WENN)