This one seems to confirm the info:
Nicolas Notton @nicolasni
Hoje eu tava na fila do cristo redentor e passou uns caras filmando um episódio de alguma coisa kkk}https://twitter.com/nicolasni
Today i was in Cristo Redentero and come guys were filming an episode of something.
This one was yesteday... i tend to believe this was for TAR France.
EDIT: Now i'm sure this is for TAR France because the clue the girl is holding is the same i saw in one of the previous tweets in the TAR France thread (those clues say "amazing race", not "THE amazing race").