Perry, who has been stumping for Clinton since before the primaries, took the stage on the final night of the convention to address the crowd prior to her performance, urging viewers and fans to register and vote.
"On Nov. 8, you'll be just as powerful as any NRA lobbyist. You'll have as much say as any billionaire," she told the crowd. "Or you can just cancel out your weird cousin's vote if you'd like."
Perry, who had boyfriend Orlando Bloom supporting her from the convention crowd and was snapped holding her hand
backstage, then performed her Olympic anthem "Rise," before launching into her powerful ballad "Roar."