The school choir are a very important part of St. Mary's.
They perform at First Holy Communion, school Masses, Prayer Services and concerts.
They entertain the crowds for the Christmas lights 'switch on' in Monaghan.
Every year, the choir sings Christmas carols in Monaghan Shopping Centre and raises funds for local charities.
Ms. Deeney and the choir, along with some of the staff travelled to the RDS, where the choir sang in the Hallelujah Concert alongside none other than The High Kings on Tuesday 13th December. The forty boys and teachers had a great day and arrived home at 11:25pm tired, but very happy.