My Favorite line from Sister act 2
Sister Mary Clarence : [after Maria has said she doesn't know the words of a song and her classmates snicker] Hey, hey - excuse me! It is NOT Maria's fault, that she does not know that Mary had a lamb. It is not - and I say this to you - it is *not* Maria's fault. Because maybe, MAYBE where Maria came from, Mary had a dog! Or a lil kitty cat! Or a little bald headed brother named Bart! It is NOT her fault and we're not going to tell her it is, are we? No, we are not!