After winning the Critics' Choice BRIT Award in 2010, she released her debut album, Lights, which reached #1 on the UK charts.
She attended the University of Kent, where she discovered electronic music and wrote "Wish I Stayed."
She has two sisters and a brother. She dated singers Dougie Pointer and Ed Sheeran. In 2019, she married Caspar Jopling. She and Jopling welcomed their first child, a son named Arthur Ever Winter Jopling, on April 29, 2021.