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Just when she thought things couldn't possibly get any worse, pictures have surfaced of Paris Hilton surreptitiously smoking cannabis.

The 26-year-old heiress was photographed allegedly smoking a joint while backstage at last month's Coachella music festival.
Paris attended the event with a group of pals weeks before her court hearing, but clearly wasn't concerned about keeping out of trouble ahead of the case.

Hilton now faces a 45-day jail term for for driving while her licence was suspended.

As it stands, Hilton - who has appealed to the Governor Arnold Schwartzenegger for a pardon via an online petition - is scheduled to be admitted to jail on June 5.