I found Kathleen MacInnes while surfing around YouTube. Music with a Gaelic bent is a favorite of mine...and Kathleen is wonderful! She and many other amazing singers and musicians can be found on YouTube if you search for the BBC Highland Sessions. Take a listen. The first link is Kathleen MacInnes singing "Jimmy Mo Mhile Stor"
The second link is Muireann Nic Amhlaoibh singing "Slan le Maigh" (catch the pronunciation of her name in the beginning - Gaelic must be HARD!)