Official The Chainsmokers World War Joy T-shirts 2019 >>>Please Check Out Our Comment Box <<< The Chainsmokers World War Joy Official T Shirt The Chainsmokers World War Joy Merchandise If The Chainsmokers' collaboration with 5 Seconds of Summer (5SOS) was up your alley, you may have a chance to see them perform it together live. The two acts have announced a fall tour called WORLD WAR JOY that will see them visit 42 cities across North America.