Tuesday, September 17, 2013 4:29am ET by  
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Katy Perry debuts new song 'Dark Horse'

Katy Perry has unveiled a new song online.

The singer has premiered 'Dark Horse' on iTunes, which features a cameo from Juicy J.

It follows her single 'Roar', with both tracks set to feature on Perry's forthcoming album 'Prism'.

'Dark Horse' is not an official single, however, with the song unleashed to preview her record ahead of its October 22 release.

Before releasing the track, Perry took to Twitter to say: "I may or may not just be eating a skinny cow ice cream with hair dye on my head refreshing @iTunesMusic nbd."

The singer meanwhile is due to close this year's iTunes Festival in London on September 30.

 

  

 

Listen to 'Dark Horse' below: