The solution to finding out if it's real or fake is simple.
Send Arnold S and Beiber down in a submarine.
If Arnie comes back alone, then it's a pyrimid and the Predators will die of Beiber fever, so we are all safe, from both Predators and Bieber.
If they both come back, it's a hoax and we'll have to find some other excuse for deploying the Bieber BioWeapon.