Katy Perry and Taylor Swift

According to MyHeritage.com, singers Taylor Swift, 33, and Katy Perry, 38, are ninth cousins.

However, during an appearance on ‘Capital Breakfast With Roman Kemp’, Perry admitted to not knowing anything about a blood connection between them, although she is open to finding out more about it.

Katy said: "Wow, I'm going to have to ask her if this is true or if we should, like, get blood tests together or something." Katy and Taylor have had a tumultuous relationship, as they have been great friends, but also feuded for a few years. Katy then joked: "Well, we fight like cousins."