Gary Barlow has dashed any hopes that Robbie Williams will replace him as a judge on next year's ' X Factor ' because he's too busy. The singer also joked that his Take That band mate wouldn't be as good as him as a judge either. Gary Barlow "I don’t think anybody [can replace me]," he told the Metro. "Everyone is speculating that Simon will be coming back and I think that would be great for the ...