Last Thursday, during the Moschino show in Milan, Katy Perry reportedly shouted "shut the f*ck up" at photographers as she posed at the end of the catwalk.

The foul-mouthed rant came as Katy arrived late for the Italian fashion house's show, and had jumped up on the catwalk to pose for photographers.

However, her model stint proved unpopular with the crowd, who had been waiting for nearly an hour for the star to take her seat, and as such it was met with boos from the audience and photographers.

Katy then turned around and told them that they would get their photos, and launched in a expletive-ridden speech.

According to local reports, Katy arrived 50 minutes late to the show, which was met with disapproving noises from the audience of fashionistas and photographers, as the presentation couldn't begin without her.

Katy Perry gets booed at fashion week