Katy Perry Just Discovered She Might Be Cousins With Taylor Swift - Billboard

Katy Perry got quite the genealogical surprise when she called into the U.K.'s Capital FM on Friday (July 10).

"Well, we fight like cousins," Perry quipped at first -- referencing the pair's famous "Bad Blood"-era feud -- before incredulously joking that the theory was nothing more than "fan fic.".

"Wow, I'm gonna have to ask her if this true, or if we should, like, get blood tests together...It's cool because you can just, like, spit in a tube." Perry said while wearing a bright yellow hoodie from her brand-new "Smile" merch line.

During the chat, the pop star also opened up about releasing the title track to her upcoming fifth studio album, Smile.

And so that's why it's kind of the opus of the record.

That's why the record is called Smile, because it's as simple as the fact that I had lost my smile and couldn't get it back.