Jam session as Amy Winehouse wanders the motorway when traffic grinds to a halt

The troubled star caused something of a spectacle on the M40 today after she found herself stuck in a traffic jam.

Not content to sit patiently in her car, the Rehab singer roamed the motorway, giving drivers more than they bargained for as she went from car to car in an effort to scrounge a lighter for her cigarette to pass the time.

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At one point she pulled up her purple vest to bare her midriff as she did a spot of sun baking while leaning on the bonnet of a car.

In a troubling sign, the 24-year-old's arms were covered in fresh scratches and cigarette burns, thought to be the result of self-harming.

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Earlier this week Amy was arrested for possession of Class A drugs and later released on bail after visiting a London police station by appointment.

Winehouse was questioned over a video which allegedly showed her smoking crack cocaine.

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The covert 19-minute clip was discovered on a memory stick which belongs to an alleged drug dealer, Jonny Blagrove and his girlfriend Cara Burton.

The Met confirmed that two people, a 34-year-old man and a 22-year-old woman, had been arrested on suspected drugs offences.

The couple have now been bailed.

Winehouse was originally questioned under caution in February and was due to return for further interview in June.