Judges on the Italian version of the Voice were stunned when they turned around to see a nun performing for them.
The YouTube clip of her performance has already attracted worldwide attention, with almost 2.5m views. The hashtag #suorcristina - Italian for Sister Cristina - has also been trending on Twitter.
Sister Cristina Scuccia got a rapturous response from the studio audience for her rendition of Alicia Keys' song 'No one'.
Each of the judges wanted to take on Sister Cristina, but the 25-year-old eventually chose rapper J-Ax, who joked:
"If I had found you at Mass I would always be in church. You and me are like the devil and holy water."
Her efforts were also appreciated by senior Catholics, with the head of the Pontifical Council for Culture tweeting his approval.
Each of you should use whatever gift you have received to serve others (1 Peter 4:10) #suorcristina