A SINGING nun has broken YouTube records by racking up 30 million hits in just seven days. Sister Cristina Sciuccia, 25, belts out Alicia Keys hit No One dressed in her full habit in the clip from the Italian version of The Voice. One of the judges, tattooed Italian rapper J-Ax, swivels his chair around to look at the singer – and his jaw drops when he sees her. He joked: ‘If I’d had a nun like you at Sunday school I’d be Pope now.’ The video went viral after it was re-tweeted by fans including Alicia Keys and Sister Act star Whoopi Goldberg. It has overtaken Gangnam Style by Korean pop star Psy as the fastest-growing YouTube hit.