KATY PERRY celebrated a very belated birthday/pre Christmas party at… “CLUB DELUXE”————————— KATY PERRY - The popular singer arrived and was eager to have fun on her birthday night? Wait a second…I just checked IMDB and it says her birthday is October 25th. She was born in 1984. The last I checked, it is December 18th and now December 19th. I wished her a Happy Birthday, as did someone else, but I guess it was not accurate information. Nevertheless, she did not correct me and was all smiles and happy. I guess we can say it was Katy’s pre Christmas party. PEREZ HILTON - The gossip guy brought a present for the birthday girl, Katy Perry. It was addressed to Kitty Perry.