I'm not familiar with "Celtic Myst" which I presume is a compilation CD
of Irish music. I do know probably the most famous version of "Song for
Ireland" was sung by Mary Black and know it's on one of her albums. I
have it but right now I'm too lazy to look for it. It may also be on a
Mary Black compilation CD also. It's also on a Dedannan (sp?) album I
have when she was in the band with Delores Keane. These two are amongst
the most popular Irish female vocalists in Ireland. Before you go off
looking for this album (good as it is), one of the criticisms was they
only sang about 3 songs on this album. Dedannan was primarily an
instrumental band. It was the same way in live gigs so I recall reading
a review where there was criticism for the lack of using all this vocal
"firepower" (critic's word) when it was available. Mary Black had the
original hit version of "No Frontiers" (album had the same name) and it
was also recorded by Jimmy McCarthy who wrote it. His album is harder
to find it's on Mulligan (an Irish label). One last tidbit, Jim Corr I
think was in a band with Delores Keane early on in his career (I read
that somewhere).