I am not sure if it is her apartment in New York. (Not that it's very important if it is or not.) I've seen that interview "In her bag" where at beginning Mattheus says they are at her apartment in New York. But there are many candids pictures in this apartment where she wears the same cloths she does during outting in Sao Paulo. For example from Amfar Gala in 2011.
Or the pictures from instagram with her sisters and her mother during Christmas. It's the same apartment. She spent last Christmas in Sao Paulo.
Of course she could decorate two apartments exactly the same. :neo2: