i was thinking i had heard of a band by that name in the reno Nevada area, but their web site says:
In 1997, Gaelic Storm was catapulted out of their formative pub haunts by an appearance in the blockbuster film Titanic. Cast as the "party band" in the steerage scene, they landed the part while still drinking pints and playing weekly at O'Brien's, a pub in their adopted home-town of Santa Monica, CA