Justin Bieber to perform on next week's X-Factor!

This year’s X Factor has raised the bar with its guest appearances and next weekend will be one of its biggest yet.Teen superstar, Justin Bieber has been confirmed to perform on next week’s X Factor results show. SCREAM!Host, Dermot O’Leary confirmed the news which has been circulating all week and added that British boyband, The Wanted and former guest judge, Nicole Scherzinger would also