Jessie J feels she can't "compete" with Rihanna and Cheryl Cole.
The 'Price Tag' singer is confident about her music and the way she looks, but she feels the pressure of being physically compared to the glamorous pop stars.
She said: "I try not worry about my looks, but they're so beautiful, it's hard to compete."
Though the 22-year-old singer can't help but compare herself to other stars, she insists she is confident about her good parts and accepts her flaws.
She explained: "I'm 5ft 9in - I love being a giant, I was front of the queue for legs, but at the back for boobs and bum.
"My hair is my thing. It's always been this style."
Jessie is obsessed with tights and is pleased she is often sent the garments for free as she goes through so many pairs.
She said: "And people always comment on my tights. I've got a huge box of them under my bed. I've been sent thousands of pairs, which is good because I always rip them on my jewellery."
Earlier this month, Jessie admitted she doesn't have a stylist and doesn't worry about being fashionable.
She said: "I've never had a stylist. I've just had a shopper. And that's only been recently.
"I'm one of those people that if I want to wear something out there I will, and if I don't, I won't."