anyone... they is widely used to avoid the problem of which singular pronoun to use. It's a non-gender specific usage that is very common nowadays. Some stick to 'he', others use 'he or she', etc.
A novelty act is a performer who does something that catches our attention because it is so unusual, but probably won't last for very long. I don't know her, but I imagine that she says things no one else is saying, but she isn't taken very seriously.