roar.

The Justin Bieber wannabe version:

(The intro is painful.  Be warned.)

The slower, calmer version:

The inspirational hospital version:

I'll confess...I hardly ever listen to the radio anymore. Which means that I hadn't heard Katy Perry's latest song until a week or two ago.  (Not a tragic thing, really.  Albeit, I do like the song.)  After looking through a few videos, I think the hospital version definitely tops all of the others.  Enjoy!