The pop singer – whose parents were pastors - told The Telegraph she has persuaded the British comedian to get his act in order.
"Russell has made very blasphemous jokes in the past, but he's making fewer all the time because he knows that I am very sensitive about this subject," she said. "You can be frivolous and fun without needing to get involved in that. And I don't know why that only happens to the Christian religion. I don't see people simulating sex with statues of Buddha, for example. For me, spirituality is something very important and I don't like it when people take it lightly. At times, I don't understand why there are artists who play that card, like when Madonna gets up on a cross to sing."