Both the singers made cameo appearances at the catwalk on February 20 to model clothes from Scott's Autumn/Winter 2014 collection, reported Ace Showbiz.
Perry, 29, donned a knee-length black satin dress and long coat. Ora, meanwhile, hit the runway in a black and gold T-shirt.
The Moschino Autumn/Winter 2014 show started 45 minutes late due to Ora who arrived late to the event.