Shayne Ward is "gutted" he can\'t take part in \'The X Factor: All Stars\'.
The former \'Coronation Street\' star - who shot to fame when he won the second series of the singing competition in 2005 - was asked to return to the show for the upcoming special featuring past contestants but already had other commitments so had to decline.
He told Closer magazine: "I can\'t do \'All Stars\' because I\'m contracted for something else.
"It\'s gutting because I loved that show - I\'m so proud of it."
However, the \'That\'s My Goal\' hitmaker will be tuning in to watch.
He added: "I\'ll be there as a fan and I can\'t wait to see [the others] who take part. It\'s going to be fun to watch."
Shayne was mentored to victory on \'The X Factor\' by Louis Walsh but they have lost contact over the years and he\'d like to see him and show boss Simon Cowell again.
He said: "I\'ve not spoken to or seen Louis in many years.
"It\'s the same for Simon, although I did see him earlier this year at the Pride of Britain Awards.
"I love Simon - they were both my bosses for many years so it would be nice to see them again."
Meanwhile, the 34-year-old star - who has daughter Willow, two, with fiancée Sophie Austin - has been working hard with his partner to stay in shape.
He said "Sophie and I train together. I champion her like she champions me.
"She looks absolutely incredible - I think she\'s down two dress sizes.
"I never thought I\'d be able to say I enjoy training, but I do. I\'ve now got a shape I\'ve never had before.
"I feel camera-ready for future projects and for my little girl - who you\'ve got to have a lot of energy for."