Cowell: All four should come back

Simon Cowell wants all four UK 'X Factor' judges to come back to the show.

The music mogul - who left the British version of the talent show in 2011 to start up a US one - thinks Gary Barlow, Louis Walsh, Tulisa Contostavlos and Kelly Rowland, who was widely rumoured to have been dropped from the panel, to appear again in 2012.