Madeline Kahn...?

Can anyone please help. Several people have said that Madeline Kahn appears in this film (clearly uncredited) and it even mentioned her appearance in this film in her obituary. I have seen this film many times and have never EVER seen Madeline in it, and cannot even think who she could play. Does anyone have a definite answer as to what scene and what role she plays if she is even in the film?!