The singer is looking for a choir to perform with her in support of her upcoming festive collection Home For Christmas, reported Digital Spy.
Choirs can enter by submitting a video of themselves performing the Christmas classic 'O Come All Ye Faithful'.
Boyle has recorded a duet of the track with Elvis Presley for her forthcoming Home For Christmas album.
The star will donate the royalties from the track to Save The Children, after she became an ambassador for the charity earlier this year.
Home For Christmas will be released in the UK on November 25.