Gary Barlow warns Robbie Williams
"It s going to be great but I know what s to come with that show. I know what it does to you. He s got some hard work ahead that s for sure. I ve told him it s a lot of hours - more than people realise. It s tiring " Barlow told thesun.co.uk.
He claimed the editing made him out to be the "bad guy" when he took on Simon Cowell s role as head judge of the show from 2011 to 2013.
"They film you for eight hours until you ve had enough and then you say something bad - and that s what they use when it goes out " he added.
Even so he urged viewers to watch the show to see Williams wild antics.
He said: "You re definitely going to see him turning the air blue so tune in. He ll be disappointed if they don t let him."
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