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).

Week Ending Sept. 1, 2013. Songs: Hear Katy “Roar”

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Week Ending Aug. 25, 2013. Songs: Robin & Marvin

Katy Perry's 'Roar' knocks 'Blurred Lines' out of No. 1 spot