'Till The World Ends' superstar Britney Spears has opened up about her sense of style and revealed that she doesn't have the time or energy to be constantly made-up with perfect hair and clothes.

Speaking to Elle magazine, on which she also graces the cover of the October issue, Spears explained that she has no ambition to be "like Kim Kardashian" because it's unrealistic to look that 'put together' every single day:

"I love my jeans and my sweats- I'm really just a tomboy at heart."

"So it's really hard for me to be like Kim Kardashian and be makeup and hair ready every time I go out of my house. I'm not a believer in that, you know? On the other hand, when you do wear those sweats, you'e like, Oh God, I should step it up a notch."

In the same interview, she also talked about how she suffered panic attacks when she first signed up for X Factor USA.