Character mistake: During the end credits, three of the magazine covers spell Whoopi's character's name as "Delores." Two of the covers spell it "Deloris," as do the credits.
Character mistake: At the very beginning of the movie, young Delores' teacher tells her to go to the board and right down the names of the apostles alphabetically. Delores writes down, John, Paul and Peter with the nun nodding in approval until Delores writes down Elvis. Paul wasn't one of the original apostles and since the nun told Delores to write it down alphabetically, the first name on the board should have been Andrew but, the nun doesn't stop and correct Delores after she writes John's name down first.
Answer: The event wasn't a Mass, it was a concert that the Pope requested. So neither he nor anyone else is there to worship; they're just there to hear the nuns sing.
ksc