Old Whiskey Robin Andrews Soprano Saxophone, Recorder, Flute, Violin, Tenor, Soprano Folk World & Country, Folk, Celtic, St. Patrick's Day
Oidche Mhath Leibh Irish Traditional, Hans-Andre Stamm Soprano, Harp, Flute Celtic, St. Patrick's Day, Folk
Old Irish Blessing Denes Agay Piano, Soprano St. Patrick's Day, Gospel, Early Music, Stage & Screen, Folk
O My Love Is Like A Red, Red Rose Simon Carrington, Traditional Scottish, Mark Phillips, Robert Burns Guitar, Piano, Bass, Tenor, Viola, Soprano Celtic, St. Patrick's Day, Folk
Omnia vincit amor Alessandro Orologio Bagpipe, Flute, Accordion, Oboe, Violin, Recorder St. Patrick's Day, Children, Celtic, Folk
Oft in the stilly night Arthur Somervell, Thomas Moore, Dominic Meccia, Benjamin Britten, Traditional Irish, Dudley E. Bayford Guitar, Piano, Organ, Electronic keyboard, Oboe, Bassoon Folk, Folk World & Country, Classical, Celtic, St. Patrick's Day
Celtic Prelude on Once In Royal David's City Andrew Emmet, Cecil Francis Alexander, Abdul Adhl Azeez, James Mayhew, Danny Crocome, Alan Beyel Horn, Piano, Handbell, Trombone, Tuba, Violin Children, Pop, Gospel, Big Band, Celtic
One Drop Jared Plane, Christine Hulmer, Irish Folk Song, Bob Marley, Matt Bronleewe, Tiffany Arbuckle Lee Piano, Bass, Bass guitar, Guitar Hip Hop, Gospel, Reggae, Adult Alternative, Celtic
Old Irish Blessing arranged for Voice and Piano accompaniment Piano Stage & Screen, Celtic, Contemporary Christian, Gospel, St. Patrick's Day
One Night Christina Perri, Danny Wood, Andrea Corr, Fran Healy, Brad Young, Anita Steiman Guitar, Piano, Electric guitar, Drums, Bass Folk, Pop Rock, Rock, Celtic, Rock & Roll
On that Day When I Cross the Mighty Sea James Michael Stevens Violin, Piano St. Patrick's Day, Gospel, Celtic
One Way Hillsong United, The Levellers, Mark Chadwick, Charles Heather, Marty Sampson, Jonathan Sevink Piano, Guitar, Recorder, Violin, Flute, Oboe Folk, Contemporary Christian, Indie Rock, Celtic, Rock
Only Time Roma Ryan, Fernando Britto, Nicky Ryan, David Robb, Enya, Phillip Keveren Recorder, Clarinet, Violin, Viola, Horn, Flute Pop Rock, Adult Alternative, Rock, New Age, Ballad
Only If Juliano Music, Nicky Ryan Piano, Guitar Celtic, Ethnic Fusion, Adult Alternative, New Age, St. Patrick's Day
Only When I Sleep Oliver Leiber, Ana Vieira, John Shanks, Andrea Corr, Sharon Corr, Jim Corr Cello, Viola, Guitar, Violin, Piano, Drum Set Pop Rock, Pop, Rock, Adult Alternative, Classical
On Raglan Road Mark Knopfler, Caroline Pearsall, Patrick Kavanagh, Clive Lane Cello St. Patrick's Day, Rock, Folk, Celtic
