A spokesman for the 24-year-old this afternoon confirmed: "She was questioned by police last week and released on unconditional bail. They have now concluded their inquiries and no charges will be brought."
Winehouse was arrested last week during a pre-arranged interview over the release of footage in January that appeared to show the singer smoking crack cocaine. The footage was originally published online by the Sun newspaper.
The singer was arrested earlier this month over allegations of assault but was released with a caution. She is contesting charges in Norway following her arrest there last year for possession of cannabis, claiming she did not realise she had signed a confession form as it was written in Norwegian.
The singer's husband, Blake Fielder-Civil, is due to stand trial for perverting the course of justice and inflicting grievous bodily harm.
Confirming that Winehouse will not face drug charges following her most recent arrest, her spokesman said: "Amy's bail date to return to Limehouse police station has been cancelled, bringing this matter to an end.
"Amy is pleased to be able to move on and concentrate on music and particularly looks forward to seeing her fans again at eagerly awaited festival performances this summer."
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