Jessie J wrote this song with Toby Gad and Shelly Peiken; Gad also produced the track. In a Songfacts interview with Peiken
, she talked about the session: "Jessie knows what she wants, and she knew how she felt that day. Something really peculiar happened: When I opened up my journal to write that day, the first title that was listed of the things I might throw out for that session, was the title 'Who You Are,' but she threw it out first like she read my mind or my journal, so she ran with it.
When you're writing with someone like Jessie and you have someone like Toby Gad on an acoustic guitar - and he is an incredible, emotional player who comes up with extremely tasty progressions and inversions and voicings - and you have someone like Jessie who knows what she wants to say and she's got ingredients and she's got words, you have to give them space. I threw a word in, a phrase in here and there, and I was certainly in the room and part of that energy, but I wasn't going to be as assertive with myself as I would be for an artist that wasn't really a writer but was in the room because they wanted their name on the song. So, she just put it out there and we helped decorate it - she's pretty amazing."