Maximum Security Surrounds Bristol at 'Dancing' Tonightnaughty but nice rob shuter
'Dancing With the Stars' will be in full lock-down mode Monday night when Bristol Palin takes the dance floor after a threatening letter containing suspicious white powder was received at the production office Friday.

"Everyone is on high alert," an insider tells me. "It's like a scene from 'The Bodyguard,' with Bristol playing the leading lady."

The ABC show confirmed that measures were taken to ensure everyone's safety before it was determined that the substance was talcum powder, but would not comment on the additional measures insiders tell me will be in place for Monday's live show.