And she liked it so much, she made a dress out of it.
From New York magazine’s The Cut (tip o’ the pixel to The Missus):
Katy Perry Voted Early
Katy Perry wore a ballot printed on her dress to perform at a campaign rally for President Obama in Las Vegas yesterday. Guess whom she’s voting for!? (Hint: not Paul Ryan.) She accessorized with a sparkly red and white microphone.
Said dress:
Vote often and early, eh?
(Call it a representin’ democracy.)
Campaign Outsider 
Nice!
Mic seems a little small.
That’s the closest Mitt Romney will ever get to her… um, well, whatever.
Vote? Is that what you’re saying, Mike?