Britney Spears’ ex-husband is GUILTY.

The former husband of the pop princess was arrested on December 30 after violating an order of protection and aggravated stalking.

He was booked in Tennessee and held in jail on a $30,000.00 bond.

Jason Alexander, whom Brit wed in Las Vegas in 2004 for a whole 55-hours, has plead guilty to stalking an unidentified woman.

TMZ reports Alexander was arrested last Tuesday, and pled guilty to misdemeanor stalking on Jan. 4.

He was given nearly 12 months of probation.

He'll have to undergo a mental health screening and submit to random drug screenings.

He is forbidden from contacting the unidentified woman, and their relationship is unknown at this time.

The December arrest marked his third one in a 12-month span.