LONDON (AP) _ ``Posh Spice″ Victoria Beckham says she became obsessed with dieting when she was told to lose a few pounds after joining the Spice Girls.
``In the gym, instead of checking my posture or position, I was checking the size of my bottom, or to see if my double chin was getting any smaller,″ she writes in her forthcoming autobiography, parts of which were published in The Mail on Sunday.
Beckham blamed former Spice Girl Geri Halliwell for introducing her to a milkshake that ``fills you up and stops you feeling hungry,″ Beckham wrote in the book, ``Learning to Fly.″
``The trouble is that when you start thinking like this, it’s hard to stop, particularly if you are an all-or-nothing person like I am.″
Beckham said her eating habits, a trip to Japan where she was unable to find the food she liked and being diagnosed with various food allergies have caused her to continue to lose weight.