The 29-year-old got requests for autographs from two young girls via a flight attendant and not only did she gave them an autograph, but also invited them and their mother to sit with her, reported Daily Star.
"The girls couldn't believe Katy Perry was sitting at the other end of the aeroplane. They didn't make a huge fuss or run over to her even though they said they were massive fans. The flight attendant quietly approached Katy asking for an autograph," a source said.
"Not only did Katy oblige, she invited the young fans and their mum to sit with her for the rest of the flight. She chatted to the girls and played the card game UNO with them. The girls were understandably giddy with excitement afterwards," the source added.