Katy Perry (Dark Horse) Cover by Our Last Night.

Katy Perry - Dark Horse Cover By Our Last Night.

This song is available on iTunes: http://full.sc/1fi07Pv
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"Dark Horse" -- originally by Katy Perry
Written by: Sarah Hudson, Katy Perry, Łukasz Gottwald, Max Martin & Jordan Houston
Published by: Kobalt Music Publishing, Italians Do It Better and WB Music Corp...