You may not know it from her role on “Shameless,” but Emmy Rossum is a trained opera singer. She’s so good, in fact, that when she was little, she would sing to the workers at her local butcher shop, and in exchange, they would give her hot dogs. So of course, Conan could not resist the temptation of trying this out himself. Needless to say, he is blown away by her performance. You can check it out above.