I can't post it here because Tír na nÓg is three words and this is One Word Song Titles. Celtic Woman aren't mentioned much back in Ireland, I guess because we have such a wide array of other great Celtic music to choose from. I see they're playing your state a few times in the next couple of weeks - are you going, Roger?
Here's one of their songs that does have a single word title.
Celtic Woman - Awakening
I'm friends with a family from England who have been here over 25 years. 10 kids in the family. The parents have accents but you can tell they've been here awhile. Only the 2 oldest kids have accents. The oldest hasn't lost it a bit. Sounds much more British than her parents.