Even though it's six years, three Grammy nominations and more than 20m global album sales since Lewis won The X Factor, she's yet to shake "the personality problem" – in other words, she remains the sweet if slightly gormless north London girl eclipsed by her own enormous voice. You'd think her team would heed Adele's success and stick with big-lunged, full-hearted ballads such as Fireflies and Lovebird, on which she's as technically irreproachable as Whitney or Mariah. Instead, they've pushed unconvincing edginess with clubbier sounds, including the title track, an overloaded mess of dubstep breaks and house beats.