The song and visual tells the story of the singer being trapped in what she described to Digital Spy as a "vicious cycle" of heartache within a past high-profile relationship. We'll give you three guesses who that was with...
"We didn't work to a track and just got on a piano and wrote what felt, at the time, like a ballad," Mollie told us about writing the song.
"It was exactly how I was feeling - I didn't even think about the press and how people would react to it - but I was just in this vicious cycle with this guy.
"It wasn't until I sat and listened back to it a month later that you think, 'Oh I wonder how people will react to that?' I'll worry about that later."