Atthe end of the guardian angel scene they are humming the tune and waving their arms, then the one in front stops and looks around to the side then she starts doing the actions again.
That was Rizzo and she was supposed to do that because in the scene he was like "unless she was a hooker!" and the Rizzo angel gave him a snarling look. and then i forgot what he said but it was kinda makin fun of Rizzo and she looked at him again.