Katy Perry's 'Dark Horse' Shows Off Her 'Genius,' Juicy J Says

'She's really hands on with her music,' Juice tells 'RapFix Live' of working with Katy Perry on 'Dark Horse.'
By Rob Markman, with reporting by Sway Calloway

Source:
http://www.mtv.com/news/articles/1713381/katy-perry-juicy-j-dark-horse-genuis.jhtml

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