NICOLE RICHIE faces jail if found guilty of driving under the influence, because, according to an American website, Nic already has a previous DUI conviction.
The socialite - famed for her 6st frame - was arrested after admitting she had taken Vicodin and smoked marijuana before driving the wrong way on a freeway on Monday night.
TMZ.com uncovered court documents revealing The Simple Life star pleaded no contest to driving under the influence in 2002.
Under Californian law, if Richie is convicted of her second DUI, a judge must impose a mandatory jail sentence of five consecutive days.
Richie was given three years probation for her DUI conviction four years ago and had her licence suspended for one year.
Six months later, Richie was arrested for possession of heroin and for driving with a suspended licence.
[Via thesun.co.uk]