Stylish Grammy Awards 2011: What All the Stars Wore! By Us Weekly Staff February 13, 2011 41 Katy Perry In Giorgio Armani, Casadei heels and Thomas Sabo jewels Credit: Katy Perry In Giorgio Armani, Casadei heels and Thomas Sabo jewels In order to view the gallery, please allow Manage Cookies For access to all our exclusive celebrity videos and interviews – Subscribe on YouTube! In this article Katy Perry