Songfacts®:

• 1D's Louis Tomlinson wrote this song with:
  
  Julian Bunetta, who is the co-writer of multiple 1D hits including "Best Song Ever," "Story of My Life" and "Steal My Girl."
  
  Another frequent 1D collaborator, songwriter and producer John Ryan has contributed to the majority of the guys' hit songs. Additionally, he has co-written cuts by Cody Simpson, JLS, Fifth Harmony, Avicii and Olly Murs,
  
  Irish singer-songwriter, Ruth-Anne Cunningham, who has had songs recorded by artists such as Britney Spears ("Work Bitch"), Pixie Lott ("Broken Arrow") and Professor Green ("Remedy" ). She also co-penned another Four track, "Where Do Broken Hearts Go."
  
  1D's unofficial sixth member, Jamie Scott has also had two UK Top 40 singles with his own band, Jamie Scott and the Town ("Just" and "Searching"), as well as contributing to many of the guys' hit tunes. He co-penned nine out of the 16 tracks on the deluxe version of Four.