I thought it would be almost impossible to fill Paula Abdul’s shoes as a judge on American Idol. Even temporarily. Because she was always the nice one. The one who tempered criticism with praise. But now it looks like the folks at American Idol have found someone just as sweet to sit behind that judge’s table: Shania Twain. She is reportedly the latest guest judge and will be taking part in the auditions in Chicago on Aug. 30-31. It’s not the coming-out-of-retirement move I would’ve expected from her, but she’s always been a vital part of what makes country so pop, so she’s a good fit for this competition. Fox Entertainment Chairman Peter Rice says guest judges like Twain will be in place until they find the right permanent replacement. “What we need to find is someone who has great chemistry,” he said. “It’s really a casting job.”