5 Weeks: James Arthur - 'Say You Won't Let Go'
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The Longest Reigning No.1 Singles In Big Top 40 History #OWNED
9. 5 Weeks: James Arthur - 'Say You Won't Let Go'
James Arthur's 'Say You Won't Let Go' came out of absolutely nowhere and knocked The Chainsmokers off the No.1 spot with ease in late 2016.