The Chainsmokers are one of the most popular EDM-dance producers of all time. They have even broken through into mainstream territory with songs such as “Don’t Let Me Down,” “Roses,” and “Paris.” The Chainsmokers are made up of Andrew Taggart and Alex Pall. They have worked together since 2014, but Pall also had a partner previous to Taggart.

In 2016, The Chainsmokers were finally able to work with one of their most wished-for artists: Halsey. Halsey joined Andrew Taggart on the song vocals, where they sang a heartwarming duet about a young couple who have just moved away together.

“If you had asked us over the last year who was an artist that we wanted to work with, Halsey was number one on that list,” Alex Pall said in an interview with Interview Magazine. “She’s a very cool and unique artist,” he added.

With the amount of music The Chainsmokers have released, it is easy to forget that they are a relatively new musical act. Andrew Taggart and Alex Pall have only been partners since 2014, but have already cemented themselves as one of EDM’s most legendary production groups.

The two musical sensations were introduced through a mutual friend, Pall’s manager, and instantly knew what contributions that other offered to the partnership. The duo began working long days in the studio, discussing their interests, discussing mainstream artists, and making music.

The song with Halsey, “Closer,” doesn’t only mark the instance where The Chainsmokers worked with one of their favorite artists, it also marks Andrew Taggart’s first effort in front of the microphone. The Chainsmokers used to exclusively write and produce their music, leaving the vocals for guest artists. Andrew Taggart has stepped up as front man and lead singer of The Chainsmokers, and they say many more songs with Taggart performing on vocals are still to come.

The Chainsmokers are consistently changing their live show to accommodate their audience and musical direction. “As our audience expands, we have to keep pushing ourselves,” Pall said.