The Chainsmokers feat. Daya - 'Don't Let Me Down'
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The Best Selling Songs Of 2016 Have Been Revealed!
8. The Chainsmokers feat. Daya - 'Don't Let Me Down'
It's Alex & Drew's second appearance in this list, proving that 2016 was ALL about EDM! Since it dropped in February, their Daya collaboration shifted an impressive 1,763,000 copies! (Pic: PA)