Amy Winehouse cleared of witness tampering

London police are no longer investigating British singer Amy Winehouse on suspicion of attempting to interfere with a court case involving her husband, her spokesman said Friday.

The 24-year-old singer is no longer required to return to a police station for further questioning, her spokesman, Chris Goodman, said in a statement.

"Amy is pleased to be discounted from the investigation and thanks the police for their professionalism in their dealings with her," the statement said.

Winehouse was arrested in December after being called to a police station. At the time, she was released on police bail and had been asked to return at a later date for further questioning.

Police said they cannot identify former suspects by name, but they did confirm that prosecutors planned to take no further action against a 24-year-old arrested in December on suspicion of trying to pervert the course of justice.

Meanwhile, Winehouse's husband, Blake Fielder-Civil, appeared in a London court Friday on charges of attacking a pub landlord.

Both he and his wife were accused of offering the landlord money to take back his allegations and withdraw as a witness at the trial. Fielder-Civil is still facing that charge.

Fielder-Civil spoke only to confirm his name and plead not guilty. He is due to appear again in April.

Winehouse didn't attend court because she was travelling to Paris to perform at a Louis Vuitton party, her spokesman said.

The singer won five Grammy Awards, including best record, best song and best new artist, in early February, but her musical success has been overshadowed by her tumultuous private life and public struggles with drugs and alcohol.