Amy Winehouse was arrested late Friday by London's Metropolitan Police on suspicion of assault following allegations that she attacked two men outside a Camden bar on early Wednesday. The 24-year-old, five-time Grammy Award-winner agreed to be interviewed by Scotland Yard earlier in the day over her involvement in the violent incident. She arrived for the interrogation at 5:15pm, more than two hours late.

The troubled 'Rehab' singer allegedly headbutted a man who hailed her a taxi and is said to have punched a second in the face after he got in her way during a game of pool, according to reports. "Amy Winehouse will be voluntarily attending a London police station today by appointment with the police," her spokesman said. "We understand that she will be questioned in connection with an alleged incident in Camden in the early hours of April 23, 2008."

Winehouse has suffered a public bout with alcohol, drugs and an alleged eating disorder. In 200, she was charged with cannabis possession after a bust. Winehouse had previously undergone treatment for drug addiction at a rehabilitation clinic which led to her being temporarily denied a visa for performances, forcing her to appear by satellite on the 2008 Grammy Awards.

Winehouse's husband, Blake Fielder-Civil, 25, is currently remanded to a prison awaiting trial on assault and conspiracy to pervert the course of justice charges. The singer missed his administrative hearing in East London 's Snaresbrook Crown Court due to her own legal troubles.