Two different versions of the song "Procure" can be listened during the film: the classical version, deconstructed during the film; and a new, original one, revealed in the credits.
The extras on Rico's show in the end are actual fans invited to participate on the shooting.
In the powder room scene the female journalist talking to Rico is Roberta Martinelli, an actual Brazilian reporter. She really interviewed Rico that day and what appears on the film is part of that conversation.