There are three artists know as Saoirse:
1) Christian hard rock band formed in the Church of Christ. Before being called Saoirse they were also known as Gig and Terrorquest.
2) Saoirse is a very talented young girl from Oakland, CA with a unique folk pop sound. saoirse.bandcamp.com
3) An Irish rebel band from the 1970s who released the album "Ireland Live On" in 1974. Read more on Last.fm