Your question cannot be answered with the information currently available.
"More Famous" is too idiomatic to provide an adequate answer without poll data from various areas & age groups, perhaps even from different socio economic groups.
Without any data of this sort there is no way to really determine which person is more widely known to the general populace therefore any answer would really be speculation, opinion and/or conjecture from the individual who answered.
that is Chris brown
Brad Pitt is way more famous in the world than Chris Brown.
chris brown of corse
definitely Chris Brown
Who is Chris Brown!
lady gaga is a man.
mario
Garfield
superman
Shrek
Goku is more famous it is just a fact
usain bolt is more famous