Last month, The Sun tabloid ran still images from a video that showed the jazz-pop diva inhaling fumes from a small pipe. The images were said to have been filmed during a party at Winehouse's London home.
Winehouse -- who shot to fame with the autobiographical single "Rehab" -- has since been admitted to a London rehabilitation center.
On Wednesday, London's Metropolitan Police said detectives interview a 24-year-old woman the previous day over allegations of drug possession. It is policy not to name suspects who have not been charged but an officer read out the statement in response to a request for information about Winehouse.
The singer and her acclaimed "Back to Black" album are nominated in six categories for Sunday's Grammy Awards, but her spokesman said no decision had been made about whether she would attend the ceremony in Los Angeles.
Winehouse's potent blend of blues, jazz, pop and soul has won praise from critics and fans, but the singer has become as famous for her chaotic personal life as for her music. Since the album's U.S. release last year, she has canceled a slew of appearances amid reports of drug use.
Her husband, Blake Fielder-Civil, is in jail awaiting trial on charges of assault and lying to police.
