Jenna Jameson Pleads Not Guilty To DUI

TMZ broke the story ... Jameson was arrested after the single-car accident in Orange County May 25th. Cops said she showed signs of intoxication, failed a field sobriety test, and was subsequently busted on suspicion of DUI.

According to law enforcement, Jenna blew a .13 and had two prescription drugs in her system at the time of her arrest -- zolpidem (Ambien) and buprenorphine (Suboxone).