Its not the last ever series!!!
BBLB even hinted last week that it was returning when they did a scetch with Bob Righter and at the end said "..untill Big Brother ends ...or will it?" or something along those lines.
I wouldnt mind getting CBB back either but only if they get proper celebrities in their, NOT nobody's like Dane Bowers or Lucy Pinder, actual proper big celebs which nearly everyone would have heard of like Latoya and Jermaine Jackson or Verne Troyer or someone.
Anyway, im almost 100% sure that big brother will return

and it is gonna be just as good, or even better!