Winehouse arrives at Holborn Police Station last week to be questioned by police over an assault allegation. She has now been arrested for a second time under drug charges
Scotland Yard said that "around 1pm (11pm AEST) today a 24-year-old woman from the Camden area attended a London police station by arrangement and was arrested in connection with the alleged possession of a controlled drug."
"This is in connection with an investigation connected to footage passed to the Metropolitan Police on January 22."
Winehouse was not named, in line with force policy, but a spokesman for the singer said: "Amy Winehouse voluntarily attended a London police station today by appointment.
"She was arrested in order to be interviewed and is co-operating fully with inquiries. The interview relates to a video handed to police earlier this year."
Scotland Yard said later she was released on bail.
The video footage obtained by The Sun tabloid apparently showed Winehouse, who has fought a very public battle against drink, drugs, eating disorders and self-harm, inhaling fumes from a crack pipe.
She was also shown apparently snorting ecstasy and cocaine.
The Grammy award winner was previously arrested on April 25 and spent a night in police cells for slapping a man during a booze-filled night out in north London.
She received a police caution and apologised.
Winehouse's husband, Blake Fielder-Civil, 25, is on remand in prison awaiting trial on charges of assault and conspiracy to pervert the course of justice.
Scotland Yard said later she was released on bail.
Winehouse, whose battle against drug addiction has often overshadowed her recording success, is said to be worth an estimated £10 million ($20 million) in the latest Sunday Times Rich List.
Dishevelled: Amy was pictured enjoying the Bank Holiday sunshine with a pal just days ago, she is now in police custodyWinehouse did not attend the Grammy Awards in Los Angeles in February, but still managed five big wins, including record and song of the year for Rehab and best pop vocal album for her breakthrough release, Back to Black.
