Last month, The Chainsmokers teased a song with 5 Seconds of Summer, 'Who Do You Love'. You're all familiar by now. However this song was only to tease a joint tour together. Again, you're probably still familiar with that news. However, earlier this week the two powerhouse pop groups came together for the first time live on The Tonight Show and if this performance of their single doesn't have you amped for their tour, you probably don't like music. Or you don't have ears. The latter I can forgive. A lot of live instruments and percussive elements taking place here. Get a taste of their World War Joy tour in this performance below.