Ronson invited the singer to join him on stage at the 100 Club in London and got annoyed when she hit the bottle backstage before going on. "After the gig Mark was furious with Amy for getting smashed and they exchanged words," the Sun quoted a source as saying.
"He was annoyed that Amy got drunk when she knew she was going on stage. It was an important gig for him and he wanted things to be right. "He felt let down by her - not for the first time," the source added.