1. Pharrell Williams - 'Happy'
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Top 20 Best-Selling Tracks Of 2014... So Far
20. 1. Pharrell Williams - 'Happy'
The top-selling song of 2014... could it really be anything else? From hilarious Internet parodies to global news coverage, Pharrell's hit single 'Happy' may have started out as a soundtrack song to Despicable Me 2, but it's gone on to become SO much more!