The song features vocals by 16 year-old singer Imani. The teenager recalled how the collaboration came about. "Sigala and I have the same management but before Sigala was Sigala, he was doing amazing productions for so many artists," she told Celeb Mix
. "He wasn't really doing his own thing. So he's worked with me since I was 14 and we did a lot of songs. We experimented a lot, probably some songs I'd be embarrassed about now, one day we just wrote 'Say You Do' in a session, that I came straight from BRIT school and then somehow that song really blew up."