It’s very easy to tell a fake Taylor Swift fan from a real fan. First of all, real fans hate the term “swiftie” so let’s get that out there right off the bat. When a celebrity says they love “Bad Blood” or “Blank Space,” odds are good they are just a casual listener. There is nothing wrong with that! But the real fans are the ones who can name a non-single track at the drop of a hat, and that’s why Paul Rudd is a Real Fan, unlike hater Robert Downey Jr.

While promoting his latest flick Ghostbusters: Frozen Empire, Rudd was asked by MTV about his favorite Swift songs, and he did not disappoint.