It must be exhausting to be such a bitter old man.
Emma has shown that she does some singing, and can probably do more. She has also shown that she's done dance... I remember back in the day she was one of the leaders of her school's dance troupe (they did Rock Challenge and stuff, I think?). Jonny hasn't been a "fan" for very long, guys. He doesn't really know very much about Emma. Everything he knows is distorted by whatever is going on in his head.