The 'Price Tag' hitmaker is pleased when she receives messages from fans who have related to her lyrics because she has always wanted to make a difference to people's lives.
She said: The most amazing thing is to comfort people.
"Every day on twitter I get, 'Your album saved my life right now' and, 'How did you put my life into words?'
"I just don't want to write music that's throwaway. Ever since I was a kid I've written poetry and songs to make people thing. I've always wanted to save the world in my own little way."
The 23-year-old star believes her desire to help people through her music comes from her father, who is a social worker, and she wants people to realize she doesn't have a "sugar-coated, perfect" life.
She explained: "My dad's a social worker and I almost want to give that to the world.
"I think people are done with, 'I'm in the club, shakin' my booty', with running away from their bad day. I think they want someone who's gonna go, 'Fix up - welcome to the real world.'
"I'm fed up of people sugar-coating life for kids, making them think everything's amazing and everyone's perfect looking and artists don't get spots or diarrhea before a show. We do. And that's what I wanna stand for.
"I want to write music that brings some light into the world."
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