Antonella Barba -- known for her appearance on the 6th season of "American Idol" -- has been arrested for allegedly trying to distribute heroin ... TMZ has learned.
The singer was busted Thursday in Virginia around 11:30 AM and is facing a felony charge of heroin distribution of 100g or more ... according to the Norfolk Sheriff's Office. Details are scarce, but Barba is still being held in jail without bond and has a court date set for next week.
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