Troubled British soul singer Amy Winehouse was arrested today as part of an investigation into perverting the course of justice, London police told Reuters.

"It was voluntary and pre-arranged," a representative at her publicity agency said.

The 24-year-old's husband Blake Fielder-Civil is being held on remand accused of inflicting grievous bodily harm. However, the trial was delayed after police launched an investigation into allegations by British newspaper The Daily Mirror that the bartender was offered money not to testify.

Winehouse, nominated for six Grammy awards, has struggled with drugs and alcohol since shooting to fame. She was pictured this month wandering the streets of London at dawn in only a bra and jeans.

Winehouse had cancelled all her remaining planned concerts this year saying she could not perform while her husband was in jail.