Simon Cowell gives Gary Barlow diet tips
Mr Nasty, 51, has even advised Gary Barlow, 40, about diet.
An insider reveals: ‘Gary still has nightmare flashbacks from when he was known as "the chubby one" in Take That and he's been open with Simon about that.
'So Simon's been telling Gary all about his own personal diet, which involves having lots of smoothies and avoiding carbs after 5pm.
‘Gary needs to eat lots of vegetables and lean protein in the evening and there's also a ban on sugar.
'Simon knows that Gary, along with all the other judges, wants to look good on the panel and he thinks he's helping.
'The fact that he has to diet himself means Si has no sympathy for anyone else who's packing a few extra pounds.'
Read the full story about Simon Cowell and The X Factor in Now magazine dated 12 September 2011 - out now!