This Christmas celebration — with singers Chloe Agnew, Lisa Kelly, Meav Ni Mhaolchatha, Orla Fallon and fiddler Mairead Nesbitt — includes such popular classics as “White Christmas,” “Carol of the Bells,” “Little Drummer Boy,” “O Holy Night” and “Let it Snow.” The special was filmed in Dublin’s prestigious Helix Centre, where the Celtic Woman phenomenon began.