We can hear Katy Perry "Roar"�all the way from London, where she performed at the 2013 iTunes Festival on Sept. 30

Katy Perry "Roar"

katy perry itunes festival 2013

katy perry

katy perry roar | Katy Perry Roar

Katy Perry

Katy Perry

Katy Perry - ROAR Photoshoot

Katy Perry in Billboard Magazine 2013

Katy Perry

Katy Perry is just the best.

Katy Perry

katy perry coachella 2013

Katy Perry

Katy Perry W November 2013

Katy Perry

Katy Perry ♥

katy perry

Katy Perry

katy perry

Katy Perry