The 24-year-old You've Got The Love singer said that she uses song writing as a way to get her feelings out.
'It's funny because I'm not actually very good at saying how I feel in person. I think song writing is a way for me to deal with my own emotional failings in life,' she told Nylon magazine.
'When I'm making a song, it's almost as if I can express how I feel. It's almost as if, to get a message across to one person, you have to sing it to a couple of thousand.'
And she added that she had some unusual aspirations as a child.
'I wanted to be a witch when I was a kid,' she revealed. 'I was obsessed with witchcraft.
'At school, me and my friends had these spell books. I always wanted a more magical reality. I had a shrine at home and I did a spell to try and make the boy in the other class fall in love with me.'