I don't know if this has been posted yet, but Lynn Hilary is on Colm Ó Foghlú's album, Mass of the Angels.
Here's the tracklist. Lynn is on 6 of the tracks, but the whole album is worth purchasing.
1. Bí I'd Aingeal Dom - Introit
2. Kyrie
3. Psalm 148
4. Alleluia5. There is No Night
6. Sanctus & Benedictus
7. Agnus Dei
8. A Aingil Aoibhinn9. Diagacht Cheoil - Benedicamus Domino
10. Greannta: Tree of Life
11. Greannta: Lava Cameo
12. Greannta: The Source
13. Greannta: The Singers
14. Greannta: That the Science of Cartography is Limited
15: Greannta: A Habitable Grief
16. Greannta: Epilogue
It's absolutely beautiful: an orchestra, a children's choir, and of course, Lynn's sweet soprano voice.
Here are some of the songs on Youtube!
A Aingil AoibhinnAgnus Dei (Lamb of God)You can order the CD on Amazon, CDBaby, and ITunes.
Edited for some silly mistakes.