Sizemore Busted for Crystal Meth -- AGAIN!

"Black Hawk Down" star Tom Sizemore is back behind bars today after cops say the actor had been using crystal meth outside of a hotel in Bakersfield, Calif.

Sizemore, who is currently on probation for another drug rap in 2004, was taken into custody early Tuesday morning after an associate allegedly tried to fight an employee outside the Four Points Sheraton hotel. The associate, Jason Salcido, was also arrested. Cops say Salcido was carrying a "narcotic smoking pipe" at the time of the bust.

A search of the 2004 Ford Mustang that Sizemore was sitting in during the arrest allegedly yielded two bags of meth and pipes.

According to police sources, Sizemore was booked at the Kern County Jail on suspicion of possession of methamphetamine, being under the influence of a controlled substance and possession of controlled substance paraphernalia.