Simon Cowell realised he had a rare talent for criticism at the tender age of four when he turned his nose up at his mother's new fuzzy white hat proclaiming, 'Mum, you look like a poodle.' Since then he's honed and toned his craft to become X Factor's undisputed champion of cutting comments, and with X Factor-mania in the air once more, here's a selection of some of our favourites...