Scherzinger to guest on 'X Factor'

Nicole Scherzinger is to appear as a guest judge on 'The X Factor'.

The Pussycat Doll - who also appeared as a celebrity judge on hit NBC reality show 'The Sing-Off' - is to join Simon Cowell, Cheryl Cole and Louis Walsh on the judging panel as a stand-in for pregnant Dannii Minogue when the first round of auditions hit Manchester.