Thanks for the Celtic links, I just looked up Enya, and I remember a song she did, Orinoco flow, that is one of my favorite songs of hers, it is beautiful. Off to look at more of her music.
I remember the first time I saw Celtic dance was in the film Blowout with Tommy Lee Jones and Jeff Bridges(I think). Forrest Whitaker was in it, too. I was surprised because the scene where the young man dances was quite good and brief. Back in the 90's Michael Flatley and Riverdance became household names. Flatley was the fastest dancer in the world. He was inRiverdance, Lord Of The Dance and Feet Of Flame. He had a falling out with a co-creatorBill Whelan, I think) over the story and costumes(Michael selected the tights all the dancers wore). He had to retire because of lung problems, if I remember. There was another show inspired by Riverdance and Lord Of The Dance, called Common Ground.