Broods is a music duo from Nelson, New Zealand, composed of Georgia Nott on lead vocals,
with older brother and multi-instrumentalist Caleb Nott on production and backing vocals
"Heartlines" is a song written and recorded by New Zealand music duo Broods for their second studio album, Conscious (2016). The song was co-written by fellow New Zealand musician Lorde and the track's producer, Joel Little. It was first released to digital retailers on 10 June 2016 as the first promotional single from the album. "Heartlines" was serviced to American hot adult contemporary radio through Capitol Records on 16 January 2017 as the second official single from Conscious.
Upon its initial release, "Heartlines" entered the New Zealand Hitseekers chart at number 3. The song generated media attention for its accompanying music video, which stars Rose McIver and was created in collaboration with Microsoft to demonstrate the capabilities of its bio-interactive Microsoft Band technology.