The Chainsmokers Talk Success at iHeartRadio Music Festival 2016: 'We're Super Grateful'

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The Chainsmokers attend the 2016 iHeartRadio Music Festival Night 2 at T-Mobile Arena on Sept. 24, 2016 in Las Vegas.

It’s an exciting time for the Chainsmokers, whose single “Closer” (feat. Halsey) has reigned over the Billboard Hot 100 for five weeks. Billboard caught up with the duo, Alex Pall and Andrew Taggart, over gummy bears at the iHeartRadio Music Festival 2016 in Las Vegas.

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“It’s incredible,” Pall said of having a No. 1 song. “We work super hard on our music, take it really seriously … to see people enjoying our music like they are, that will never get old. We’re just super grateful.”

As for working with Halsey, he said: “She’s an artist who the last year before we put the song together, we said she was the artist we wanted to collaborate with the most.”

Watch them answer questions (while eating candy) in the video below.