Katy Perry Dark Horse (PRISM)

Katy Perry will be performing live on YouTube on November 22nd! Check out her performance, and many others at link

More info:
YouTube(TM), the leading online video community for people to discover, watch, and share originally created videos, has added to the talent lineup of YouTube Live, the company's first official live community celebration. The in-person audience of thousands will experience some of the site's renowned musicians, bedroom vloggers, side-splitting comedians and world-class athletes at Herbst Pavillion in Fort Mason on November 22. The event will also be streamed live on YouTube...