It does seem that there will be a live stream of Faith No More’s show at the SWU festival in Brazil tonight.
Another link:

We’re not guaranteeing anything but check the following urls:
SWU Festival Facebook page
Globo Multishow site (reading here the show may be live on TV but not on the web)

SWU festival page

More info here:
Multishow Twitter
The Holy Filament Twitter
fnm4ever Twitter