Who is or was the heaviest woman in the world and what was her weight?

The world's heaviest woman was Rosalie Bradford. (1200 pounds).

Update

The world's heaviest woman was Ashlee Gonzalez Segovia. (1600 pounds).

Update

The world's heaviest woman was Renee Teresa Scarfa who weighed a staggering 1,800 pounds at the time of her death. She died November 28, 2008 at the age of 49. Cause of death was cardiac complications stemming from severe obesity. At this time her weight has not been officially confirmed or verified but sources close to the family claim that it accurately reflects her weight close to the time of her demise.

Update

An unidentified 44 year old woman from the USA was admitted to a hospital on August 3rd, 2004 weighing at least 2,000 pounds but was estimated to weigh as much as 2,500 pounds. A crane and heavy flat bed truck were required to move her. Though her name was not released, one family member admitted that she had been gaining weight steadily for the past 10 years.