"Hey Girl" is a song written by Lady Gaga and Florence Welch, of Florence + the Machine, for the studio album Joanne. Gaga performed a small snippet of the song October 5, 2016 during her interview with 102.7 KIIS FM. The track is the only collaboration on the album.
During an interview with BBC1 Radio, Gaga spoke about the collaboration on the album, "There's a feature on the album that I think you will be very excited about. Me and Florence Welch did a duet together. I started to work on an idea for a song that I really wanted to do with a girl. You’ll see why when you see what the song is about." She continued, "I just thought, ‘Who do I want to sing with?’ She’s really to me if not the best, one of the greatest vocalists in the world. She’s incredible."