This diet is an example of niche marketing, in this case to the "Sex and the City" crowd. Published in 2005, it started climbing the bestseller lists in 2007, after Victoria Beckham, aka Posh Spice (pictured), was spotted carrying a copy. The diet is made up of five steps, in which dieters work from banning all sugars to becoming vegetarians to subsisting on fruits, vegetables, and not much else.