Katy Perry

Katy Perry belts 'Rise' and 'Roar' at Democratic convention

Katy Perry sparkled in a slinky, silver dress Thursday as she belted her new song "Rise" and her signature "Roar" for an audience of Democratic delegates waving their glowing cellphones.

Perry urged the TV audience beyond the Democratic National Convention floor to vote and donate to Hillary Clinton's presidential campaign.

"You'll be just as powerful as any NRA lobbyist. You'll have as much say as any billionaire, or you'll cancel out your weird cousin's vote, if you like," said Perry, who has stumped for Clinton and jokingly offered to lend new donors some of her outfits.

The star power on the final day of the convention wasn't just...