The singer, who is on her 27-dates tour, her hubby Blake Fielder-Civil and another person were arrested on suspicion of possession of drugs in Bergen on Oct 18.
The police acted on a tip-off received from staff at the Hotel Norge who complained that a strange smell was emanating from the singer's suite.
A police raid recovered seven grammes in the room, reports Contactmusic.
A police source said that the singer was so intoxicated when they raided her room that she couldn't even stand properly when she was arrested.
However, the trio was released on Oct 19 after each of them paid 500 Euros fine.
Winehouse, however, continued her revelry by gulping several glasses of bubbly before she took to the stage to resume her European tour.