The show in Berlin yesterday was awesome! the sound was sooo good, I could hear her voice cracking all the time. Compared to opening night and Milan last week, this one was the best in terms of sound. Yes the backing track is there especially on higher notes, I think the blending works good actually. I suppose that as she got more confidence a few dates in, they were adjusting the background vocals. She was also making jokes about people in Berlin doing a lot of drugs, MDMA/MDNA joke and all. it was fun