The Independent — Fifth Harmony celebrate success on top of the Empire State Building. Simon Cowell's 'female One Direction' group joined Katy Perry atop the US charts.     more info

Topix — Katy Perry kept locks of Miley Cyrus and Taylor Swift's hair in her handbag after they shared a dressing room at the Grammy Awards a few years ago. more info

411 Mania — Prism is projected to have a record sales week… more info

Chorus.fm — *Katy Perry* (http://www.katyperry.com)'s new album, Prism, is set to debut at #1 next week with around (http://www.billboard.com/articles/news/5763264/katy-perrys-prism-set-for-no-1-debut-on-billboard-200-chart) 275,000 copies sold. more info

Starpulse — Katy Perry used to keep Miley Cyrus and Taylor Swift's hair in her handbag. more info

L.A. Times - Pop & Hiss — Katy Perry debuted her latest album, “Prism,” with an album release party where she performed stripped down versions of new material and sat for an interview with TV personality Mario Lopez. more info

Topix — The release of PRISM marks the return of Katy Perry but also several key musical players responsible for some of the best pop music of the past two decades. more info

Starpulse — Katy Perry was "very depressed" after splitting from Russell Brand. more info

Big Apple Music Scene — Given that Katy Perry is so weirdly obsessed with John Mayer's brain, have we ever considered the fact that he might be obsessed with hers, too? And that he might have been removing little pieces of it to make it easier for him to study? Because that... more info

Starpulse — Courtney Love thinks Katy Perry's is "kind of sad". more info