LONDON - POLICE arrested singer Amy Winehouse on Tuesday on suspicion of attempting to interfere with a court case involving her husband.

Police questioned the 24-year-old soul singer and released her without laying charges, her publicist said in a statement.

'She attended a police station voluntarily and at a pre-agreed time,' the statement said. 'She was arrested but that is common practice for someone being interviewed by police.'

Police would not identify the singer by name but confirmed a 24-year-old was arrested during an appointment at a police station in connection with an investigation into perverting the course of justice.

Police said she was released on bail and ordered to return to a London police station in early March.

Winehouse recently canceled all concerts and public appearances for the rest of the year on doctor's orders. Her husband, Blake Fielder-Civil, was ordered held in custody in London last month on charges of perverting the course of justice stemming from a case in which he is accused of assaulting a barman in June.

Fielder-Civil allegedly tried to interfere with a witness' testimony, according to court documents.

Winehouse, an admitted marijuana smoker, has been dogged by reports of continued drug use amid a flurry of canceled concert dates. She was recently spotted walking outside of her London home wearing a bra and jeans, with no shoes, looking distressed. -- AP