When they say "fatten up" they mean tipping the scales at 85 lbs

Victoria Beckham has been told to eat more so she can "keep up with the strenuous dance routines planned for the tour." Woman doesn't dance, she poses! I have never seen this woman dance, they are telling us lies!! We'll see if this "eating more" to Posh means two leaves of lettuce a day instead of one. (Source)