Country music star Nathan Carter performed a special charity concert in front of 300 people in Castlerea Prison last night.
It took place in the prison chapel in front of staff and invited guests from the region.
Prisoners weren't allowed to attend, but they can watch a recording on their cell TV channel from today.
Carter explains what inspired him to play in a prison for the first time.
A governor in the prison, Graham Maher, says Castlerea inmates played a big role in organising the concert.