British singer Amy Winehouse performs at the Glastonbury Festival 2008 in Somerset in south west England in this June 28, 2008 file photo. Winehouse, whose career has been blighted by alcohol and drug abuse, on June 21, 2011 has cancelled all her scheduled concerts after she was jeered by fans in Serbia recently for a shambolic performance. Picture taken June 28, 2008. REUTERS/Luke MacGregor/Files (BRITAIN – Tags: SOCIETY ENTERTAINMENT)