Cheryl Cole returns to `X Factor`

London: Music mogul Simon Cowell has "welcomed back" singer Cheryl Cole to ‘X Factor’.

"Welcome back Cheryl. X," Cowell tweeted, according to thesun.co.uk. Cole will help judge Gary Barlow mentor acts of the over-25 category in later rounds of the musical show. Her entry was kept top secret by Barlow, who orchestrated the plan of having Cole on the show. IANS