Katy Perry & Rihanna: Karl Lagerfeld Lovely: "

Katy Perry and BFF Rihanna sit next to each other at the Karl Lagerfeld ready-to-wear show as part of Paris Fashion Week Spring/Summer 2010 on Sunday (October 4) at Jardin des Tuileries in France.

During the show, WWD overheard Rihanna affectionately calling Katy a whore. Fierce glove, RiRi! Sitting second row were Rihanna’s styling team, Mariel Haenn and Rob Zangardi.

Other pictures include Rihanna and Katy posing with designer Jean-Paul Gaultier after his fashion show the day before.

Katy is rumored to be dating British comedian Russell Brand.

15+ pictures inside of Rihanna and Katy Perry looking Karl Lagerfeld lovely…