Also spotted attending the Chanel show were hot model Kate Upton, who was spotted with US Vogue editor Anna Wintour.
French actress Vanessa Paradis, who split from long-time partner Johnny Depp earlier this year, also looked elegant at the show.
Katy, 28, performed at the iTunes Festival at London’s Roundhouse Monday night (Sept. 30) and switched into a stunning floral Chanel gown for the show.
Katy Perry Elegant, Regal at Chanel Show
(Click Photos to Enlarge)
Her dress featured a wide black, jeweled belt. She accessorized with a chain choker, a camera shoulder bag and sky-high black stiletto heels.
“I wish there was a Chanel emoji!” Katy Tweeted.
UK songstress Ora, 22, was there to support BFF Cara and sister Poppy Delevingne. Rita was romantically linked with Cara earlier this year. Ora wore a knitted mini-dress with feather flourishes.
Cara walked in the Chanel show with Kerr and top model Lindsay Wixson. They wore either platinum or black wigs to highlight the clothes created by German designer Karl Lagerfeld.
Kate was dressed down for the event in black skinny jeans, a V-neck top and a grey jacket. Was that because she was hanging with her fashion mentor Wintour?
Paradis went with a masculine look in a black trousers suit jacket and sheer blouse.
Later this week, Valentino, Alexander McQueen, Louis Vuitton, Miu Miu and Hermes will present. Check out Katy’s dress and other celebrities and follow TheImproper on Twitter for the latest fashion news.