All We Know by The Chainsmokers

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The Chainsmokers All We Know
Justin Bieber Taylor Swift Katy Perry

Last week "Lean On" joined 13 other songs that surpassed the 1 billion views mark on YouTube. Isn't that cray cray? You can find a list of all the songs here. You've heard these songs a million times but which one should be your ultimate theme song.




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