"Sherene asked Amy if she could take a photo," the source alleged. "Amy was OK at first, but then Sherene asked if a friend could get in the shot, Amy lashed out." The source said the 25-year-old, who has had a number of medical and substance-related problems in the past year, had just completed a "tragic" on-stage performance with her goddaughter Dionne Bromfield. "It was tragic—she seemed totally wasted," the source told the Mail regarding Winehouse's performance Thursday. "She was jumping all over Dionne as the poor girl tried to sing for the crowd. Amy didn't really sing a single note—it sounded more like she was grunting down the mic."