"Roar" video premiere

HOLD THAT TIGER: The video for Katy Perry’s massive “Roar” has just premiered on VEVO, and it’s a doozy, as you’ll soon see. This Friday, Perry will appear on GMA to reveal the cover for Prism on the Times Square jumbotrons and make what Capitol assures us is “a very big announcement.” She’ll perform at the iHeartRadio Music Festival in Vegas on 9/20 and will close the iTunes Festival at The Roundhouse in London on 9/30. All in a month’s work for a super diva. Speaking of VEVO, check out the latest updates from the video site here. (9/5p)