USA Today Music — She'll perform the hit from an undisclosed location in Brooklyn more info

411 Mania — Their singles are both hits... more info

Topix — Katy Perry dropped her latest smash single, "Roar," last week and, as most of the Teenage Dream's songs tend to do, it obliterated the competition. more info

411 Mania — She's feeling good... more info

411 Mania — And her next single... more info

Chorus.fm — *Katy Perry* (http://www.katyperry.com)'s "Roar" will sell (http://www.billboard.com/articles/news/5657740/katy-perrys-roar-now-aiming-to-sell-525000-plus-downloads-in-first-week) between 525k-550k downloads, which will put the track in the top 10 of... more info

Kings of A&R — Katy Perry could outsell Lady Gaga by double more info

411 Mania — "Roar" is a big hit and Gaga sells okay too… more info

Topix — Who joined Jay-Z for his final Legends show in Miami? Did Toni Braxton have a wardrobe malfunction? What makes Katy Perry "Roar" in real life? Toni Braxton suffered an embarrassing wardrobe malfunction on stage this weekend. more info

People.com — Plus: The Mean Girls joke heard 'round the world more info