Ahead of their Celtic Christmas US tour, Affinití treat us once again to a magical Celtic rendition of "O Holy Night."

It's time for December 4th's Christmas Advent Calendar surprise! So far we've been treated to hilarious Irish Christmas pranks as well as a great singsong of favorite Irish carols from a school in Ireland but today we hand over the reindeer reins to the talented Affinití. 

Irish trio Affinití will this December wow US audiences with their beautiful Celtic renditions of Christmas classics such as "O Holy Night." 

Joined by the nephew of legendary Irish-American singer Bing Crosby, Howard Crosby, the trio will play a set of dates for "A Celtic Christmas" throughout Oregon and Washington before finishing up with a massive evening of festive Celtic cheer in Englewood, New Jersey. 

Read more: Gorgeous rendition of Christmas favorite O, Holy Night (VIDEO)

"We ask the audience afterward what were their favorite songs and the two songs that are always the favorite are 'O Holy Night' and 'Danny Boy' and the Celtic version of 'O Holy Night' also so it's a little bit different to the original," Emer Barry, Affinití's soprano told IrishCentral.

Made up of soprano, violinist, and harpist, Affinití first started out when Barry and violinist Mary McCague met at the Sligo Feis Cheoil and began to discuss the possibility of teaming up to use their classical training for a new Celtic act.

"The harp being part of it was to try and make it a little more Irish and to make it a little bit different because there's an awful lot of piano and voice going around. We thought it would be nice to have the violin and harp together," Barry continued.

"It just took off and we did so many different things in terms of repertoire. We started off kind of doing Celtic classical music and then we did a bit of rock and pop and then we kind of realized we could make everything sound a little Celtic no matter what."

Read more: Irish Christmas tunes to get you in the holiday spirit

Affinití and Howard Crosby.

Affinití and Howard Crosby.

Affinití were then joined by special guest Howard Crosby, who claims Liam Neeson's mother among his most adoring fans, when they met at a charity event in the National Concert Hall in Dublin. 

"I did some songs from my uncle's Irish album for the audience and they seemed to like that quite a bit and right after I was on, the Affinití girls came on and I'm standing backstage with my jaw on the ground thinking, 'Boy, thank God I went ahead of them and not after them,'" Crosby jokes. 

"I wasn't doing any music at that time when he was alive," Crosby remarks of his famous uncle, explaining that he knew him more as a golf player than as a singer.

"But after I got into it and getting into it a bit more and having fun with it, I started to discover that pretty much any song he sang I can probably sing it in the same key because we have kind of the same range, which is interesting."

As for "A Celtic Christmas," US fans of Affinití can expect more of their fantastic Celtic Christmas crossovers, McCague explains. 

Read more: The most beloved Irish Christmas traditions (VIDEO)

Irish trio Affinití.

Irish trio Affinití.

"We try to keep half of the concert Irish music and then the other half kind of Christmas with a little bit of a nod to the golden era of Hollywood because we have Howard with us as well," she states.

"There's a good mixture but everything has that kind of Celtic blend unifying all of the genres. 

"We always do a meet and greet after the concert as well and [there is a large] amount of people who come up and mention their Irish heritage and what relations they have in Ireland and where they've from," she continued, "and just how proud they are of their Irishness and how much it means that they hear an Irish group coming over. I think that's really special as well."

Affinití now have plans to return to the US for a special St. Patrick's Day run of shows  but you can catch them at several locations on the west coast and in New Jersey in the next few weeks!

 You can find more info and tickets for "A Celtic Christmas" by Affinití featuring Howard Crosby here. 

Afinnití and Howard Crosby bring a special Celtic Christmas to the US with their latest December tour. Affinití