She said: "I don't feel pressure, no, as I know I'm kind of voluptuous and I've always been that way. Saying that, I'm young and metabolism is on my side and my schedule is so crazy that I lose weight from the intensity of it. But if you ask me that question in five or six years and I'll probably have a different answer for you."
However, the 25-year-old singer - who is engaged to British funnyman Russell Brand - is constantly nagged to eat healthily by her older sister.
