Ms Perry, showing off stunning makeup and natural rhythm, held hands with the collection of Clinton supporting congressional candidates and politicians, dressed in plain business attire and struggling to look comfortable in their own skin.
But then they left the stage, and Ms Perry, one of a roster of top celebrities the Clinton campaign is deploying in the final days of the campaign, got to work.
Brimming with energy she blended her biggest hits with rallying political calls. Performing 'Part of me', she paused after the lyric "find out who is really there for me": "Are you there for her?" she shouted. The audience responded with deafening cheers.
at natural rhythm
