Celebrities hopping into bed with the diet industry is nothing new, of course. Ever since a size 12 Oprah Winfrey wheeled a cart filled with 67 pounds of animal flesh onstage to celebrate her hard-won weight loss, stars have known there's money to be made by spilling your guts about your overspilling gut.
As the nation awaits next month's Hollywood version of her life, it gives us another chance to re-write that obituary which has been lying on every editor's desk since 22 November 1990, when the chorus 'Maggie Maggie Maggie, Out Out Out' was sung not by a bunch of pinko anarchists, but her best mates in the cabinet.