"America's Got Talent" is off to a rough start ... filming has been cancelled next week because of the death of Mel B's dad.
Martin Brown died Saturday after a 5-year battle with Myeloma. He was 63.
Producers have cancelled filming Monday and Tuesday, but even when it's back there's a big challenge ahead, because the show is host-less ... this after Nick Cannon quit.
Mel B said she and her sister were by their dad's side when he passed.