TMZ broke the story ... Jameson was arrested after the single-car accident early in the morning on May 25th. We're told she showed signs of intoxication, took 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).
Jenna has been charged with two counts of DUI and one count of driving without a valid license.
If convicted on all counts, Jenna faces up to a year in jail.