Zak Bagans

The "Ghost Adventures" crew will NOT be allowed to investigate the "American Idol" mansion for paranormal activity -- because TMZ has learned, the owner is worried about their negative energy. As we previously reported, the ghost seekers contacted people at "Idol" to investigate the mansion ...…

The crew from "Ghost Adventures" believes there may be DEMONIC activity inside the haunted "American Idol" mansion ... and they want to investigate the place ASAP ... TMZ has learned. Zak Bagans -- lead investigator of the "Ghost Adventures Crew" -- insists the alleged paranormal activity inside…