What makes you believe these people are possessed?

From a celebrity standpoint and also how they hold up the ok symbol in the exact same way in so many diff pics, theyve been clearly taught how to hold the symbol. Thats the difference between the celebs and the child in your pics. The child doesnt know what he/she is doing. Bieber is flashing a symbol, the exact same way he has been doing for so long.

Maybe he is not religious and doesnt know the true meaning or maybe just uses it to appear edgy. You could be right about it, who truly knows..

Ephesians 6:12 For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places.