Britney Spears is out of the The X Factor USA after just one season. Indications are that show boss Simon Cowell was about to fire Britney for being ‘boring’. The 31-year-old singer judging style had been heavily criticised. A source said: ‘Britney and her team knew it was unlikely she’d be asked back as a judge. ‘The producers have already been making other plans for next season over the holidays. ‘The reality...