NOVELTY
new one on someone
something one has not heard before and that one is not ready to believe. (Informal. The someone is often me.)Jack's poverty is a new one on me. He always seems to have plenty of money.The city's difficulties are a new one on me.
nine days' wonder
something that is of interest to people only for a short time.Don't worry about the story about you in the newspaper. It'll be a nine days' wonder, and then people will forget.The elopement of Jack and Anne was a nine days' wonder. Now people never mention it.