My receipts : http://www.abpd.org.br/certificados_interna.asp type in Britney spears and you will see all Gold albums. Femme Fatale hasn't been certified yet so I think FF going platinum there is yet another myth the Britbots created.
And if you check the Femme Fatale tour receipts of Britney in Brazil, they're kind of poor... especially when you compare them to Bey's or Gaga's up-and-coming Brazil tour receipts.
That's the problem, there's no clear definition, especially when it comes to The Fame Monster. Some say it's a full LP because it's length is good enough. Some say it's an EP because it doens't have up to 10 songs. In the end, it's up to the individual.