The Chainsmokers had at least one song.
The Chainsmokers . Their debut EP , Bouquet was released in October 2015 and featured the single `` Roses '' , which reached the top 10 on the US Billboard Hot 100 . The duo 's second EP Collage was released in November 2016 , consisting of several previously released singles . Their debut studio album Memories ... Do Not Open was released in April 2017 .