Britney Ignites Hotel Beatdown -- Cops Called

10/2/2007 12:18 PM PDT
Moments after Britney Spears arrived at the Peninsula Hotel in Beverly Hills last night, a member of hotel security was knocked out -- allegedly by a trespassing paparazzo!

It was pure chaos outside the five star hotel last night, with panicked security chasing photogs off the property as Spears checked in.

TMZ shot video of a car leaving the scene at a high rate of speed, allegedly with the assault suspect inside.