Katy Perry's 'Roar' Debuts on Pop Songs Chart, Heading for Hot 100 – Billboard

To no one's surprise, Katy Perry's new single "Roar" is off to a roaring good start. The song leaked prematurely to the Internet on Saturday, Aug. 10 -- two days before its planned premiere today (12).

Katy Perry Makes Hot 100 History: Ties Michael Jackson's Record – Billboard

Katy Perry's albums and songs sales - ChartMasters

Katy Perry Brings Her Game to EPIX with the World Television Premiere of KATY PERRY: THE PRISMATIC WORLD TOUR

Miley Cyrus' 'Wrecking Ball' Is No. 1, But Is It A Real Hit? : The Record : NPR

Katy Perry Launches New Label Metamorphosis Music, Signs Ferras

Katy Perry previews new album 'Prism' at NYC event, News

Katy Perry, Biography, Music & News

The Secret to Making One of the Fastest Selling Pop Songs of All Time

Roar widens its lead at No. 1, while Lana Del Rey and Drake also move up: ohnotheydidnt — LiveJournal - Page 2

Katy Perry's 'Rise' & Britney Spears' 'Make Me' Debut in Hot 100's Top 20