Roar Singer Katy Perry gives an emotional performance at the iHeartRadio Prism release party and then talks to host Mario Lopez.<br /><br />For more Hollywood news and gossip:<br />http://www.youtube.com/hollywoodcia<br /><br />Subscribe at:<br />http://www.youtube.com/subscription_center?add_user=HollywoodCIA<br /><br />Like us on Facebook:<br />http://www.facebook.com/pages/HollywoodCIA/436512883027753<br /><br />Follow us on Twitter:<br />https://twitter.com/#!/hollywoodcia201
