She told Fox 11 Los Angeles: "To Katy Perry, please stop."
"It's not doing anyone any good except hurting a lot of people."
The Sisters of the Most Holy and Immaculate Heart of the Blessed Virgin Mary have owned the property for more than 40 years, but they have not lived in the convent for several years.
Perry — daughter of Protestant pastors — had tried to win over the nuns, even going so far as to stage a private performance for them, singing Oh Happy Day.
But the nuns were reportedly unimpressed by the fact Perry had to read the lyrics on her smartphone and were nonplussed by the tattoo of Jesus on her wrist."