I like the Celtic Women. THis does not stop me from pointing out the obvious. The fiddler here cannot be making that specific quality of sound we hear when she spins and flips so wildly around while playing----ask a top notch violinist--or top notch violin teacher. Look at the physics and science of the violin. To get the smooth connected sound she is supposedly making at all times, the bow must be in contact with the string in that "sweet spot"---among other factors, the bow must be closer to the bridge than hers is when she spins and flips. Her bow is way down on the tailpiece most of the time when she spins--and that is not surprising--in the act of spinning one's bow would not be able to stay that steady at all moments. Shame on you violinists on this thread who say the sound is all hers! Actually, I guess some violinists here actually said she is "really playing" and that I do agree with. SHe is most certainly playing it--but clearly her mike is off and the sound we hear is at the least mixed with her live playing, or may be entirely pre-recorded.   I don't know and I don't really care how they're doing this, but I really do care about the violin--and spreading misconceptions about the nature of this instrument and the physics of its sound.