Simon: 'Cheryl and Nicole would have clashed'

Simon Cowell says Nicole Scherzinger and Cheryl Cole wouldn't have been compatible on 'The X Factor'.

The 'Boomerang' singer - who mentored James Arthur to victory in 2012 - quit the show in February after two years on the judging panel, and head judge Simon, who is returning to the panel with Cheryl at his side, feels the two pop divas would have clashed.