A Sicilian nun who appeared on Italy's version of The Voice and delivered a show-stopping rendition of Alicia Keys' "No One" has become an Internet sensation.

25-year-old Sister Cristina Scuccia, who stunned the judges on The Voice of Italy when she took the stage clad in her black and white habit on Wednesday, has become an online star, with an audition video viewed on YouTube more than three million times.

According to the Guardian, Scuccia said she wasn't sure how Vatican officials would feel about her singing the pop hit, but did mention she anticipated contact from The Pope.

"I'm expecting a telephone call from Pope Francis, certainly," she said. "Because he exhorts us to go out, to evangelize, to say that God does not take from us, but rather gives us more."

Cardinal Gianfranco Ravasi, culture minister of the Vatican, posted on Twitter his approval, Wednesday.

"Each one should use whatever gift he has received to serve others (1 Peter 4:10)," the religious official wrote.

Judges on The Voice of Italy, which include rapper J-Ax and performer Raffaella Carra, were shocked when they turned their chairs around and saw the woman belting out Alicia Keys' hit was, as Scuccia put it, "a very real nun."

The judges praised Scuccia's "crazy energy" in addition to her "incredible performance."

This wasn't the first time Scuccia has been in the limelight - the 25-year-old won an award at a Christian music competition last year.

Singing nuns aren't a newfangled thing, either: Belgian Sister Jeanine Deckers, also known as Soeur Sourire, gained serious fame in 1963 when she sang "Dominique." Whoopi Goldberg and Julie Andrews both played musically-inclined nuns in "The Sound of Music" and "Sister Act."