The 'Nobody's Perfect' hitmaker - who has written songs for US superstars including Miley Cyrus and Alicia Keys – believes she is "representing" the UK and loves her home country and its attitude.
She said: "I definitely like to think I'm repping for the UK.
"I think I ooze British. I'm very sarcastic and I like to take the mickey out of myself. And I definitely do that very British thing of, take things with a pinch of salt, stiff upper lip, you know what I mean?
"Nothing comes easy but we like it that way."
The 23-year-old singer has previously been open about her bisexuality, and thinks it is a sign of her generation about the easy-going nature of sexuality.
She adds to Stella magazine: "I've been with guys and I've been with girls. And I kind of think it's about the person not the genitals.
"A lot of people are like, 'Oh she doesn't know what she is.' But I definitely think my generation is more easygoing about it.
"I mean, I think it's harder for boys to be bisexual. I think if a girl's bi there's more acceptance because guys like it."
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