Katy Perry Gets Booed At Moschino Show During Milan Fashion Week

Haters gonna hate!

Katy Perry attended the Moschino runway presentation for Milan Fashion Week yesterday, but unfortunately she took being "fashionably late" a little too far and got booed by angry red carpet photographers who were waiting to snap her pic!

The singer arrived just before 9pm, but apparently she was scheduled to be there at 8pm. John Mayer's lady love didn't expect the unfriendly welcome, either!

An onlooker told Us Weekly that the brunette beauty seemed "upset" throughout the show, and was "pretty shaken up" while posing with fans afterward.

Rita Ora was on hand to help comfort the "Roar" chanteuse after the show, though, and the ladies put the incident behind them by enjoying a relaxing dinner at Santa Telca restaurant in the city.

We would never boo KP!