'Who You Are' will be the fourth track lifted from the singer's debut album of the same name, with an official release date yet to be announced.
Discussing which song she plans to put out next from the platinum-selling LP, she told Digital Spy: "'Who You Are' has to be a single, and maybe one or two more after that - but 'Who You Are' is the most important single for me."
Asked if she had started work on a follow-up record, she revealed: "There are songs that are floating around, but I don't see myself as an artist that makes albums - I'm an artist who writes music, and you pick the crucial ones from your journey that make an album.
"For me as a writer, creatively it never stops - you can't switch it off and switch it on, it's about writing about your whole journey."
The singer picked up her third consecutive top ten hit last Sunday with her latest track 'Nobody's Perfect'.
Watch the official music video for Jessie J's 'Nobody's Perfect' below: