The 26-year-old singer went out with nearly 20 friends to celebrate her assistant’s 30th birthday! Katy was joined by her BFF, J. Molinari designer Markus Molinari, her band, and her dancers!
Katy dressed up a LBD with Chanel bangles and cuffs and Sergio Rossi shoes.
Katy’s currently in the middle of a European music tour in support of her most recent album, Teenage Dream.