7. Katy Perry Feat. Juicy J - 'Dark Horse'
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Top 20 Best-Selling Tracks Of 2014... So Far
14. 7. Katy Perry Feat. Juicy J - 'Dark Horse'
Peaking at number four, Katy went all club-central on us with her 'Prism' single 'Dark Horse'… even calling in Juicy J for a rapping middle 8!