A clip of Amy Winehouse snorting a white powder-like substance while performing a concert in Volkshaus in Zurich last year has been posted on You Tube.
The 37-second clip shows Winehouse placing her hands behind her head for 26 seconds, then placing her arms by her side, before bringing both hands to her nose.
She snorts the substance contained in her right sleeve, then places both arms by her side while continuing to sing.
A trail of the white substance remains on her nose.
Just after she returns her arms to her side again the clip recorded on a mobile phone ends.
The clip has been viewed over 1.1million times.