If she were not wearing the costume of a nun, the world would have never heard of her. Here is Cristina going out among the peripheries as commanded by Francis.
Sister Cristina singing at the Concerto di Natale
Mariah Carey's All I Want For Xmas Is You
Coldplay's Fix You *
* Coldplay is a group best know for their anti-Catholic hit album Viva la Vida whose subject is the decline of the Catholic Church in Revolutionary France
*** BONUS ****
DJ Bob Sinclar and his electro house dance music