'I'm not built to be a pop star'

Despite enjoying mammoth success with 'Royals' and her debut album 'Pure Heroine', as well as winning BRIT Awards and Grammys, the songstress has admitted she doesn't have the natural "charisma" to be famous.

She said: "I'm not built for pop star life. To have a public-facing existence is something I find really intense and is something I'm not good at. That natural charisma is not what I have."