Whoa. This came from out of nowhere. Looks like we're getting a collaboration from pop powerhouses. The Chainsmokers just announced earlier this morning their new song 'Who Do You Love' will feature none other than 5 Seconds Of Summer. Based on the snippet they've given us, this one could be a big song. We'll find out tomorrow morning 8am EST. Until then, you'll have to keep replaying the clip.