Kim Kardashian can't stop working.

The 30-year-old reality TV star - who recently got engaged to sportsman Kris Humphries - struggles to switch off and can't resist checking on her various endeavours even when she is on holiday.

She said: "I'm always travelling. Having so many business ventures gets hectic.

"Even when I take days off, I find myself sneaking off to approve shoes for my website or photos for my perfume campaign. I'm a workaholic."

Despite her hectic schedule, Kim - who has an online shoe company, clothing line, jewellery collection, two perfumes and co-owns three boutiques - insists she doesn't mind putting in the work because she wants to do well.

She said: "If I'm doing something, then I'm 100 per cent involved. That's what it takes to be super-successful.

"From ad campaigns to pictures to wording, I want it all to be perfect. I don't want to be just a face."

However, the brunette beauty admits she often runs into difficulties with her work.

She told Britain's Glamour magazine: "There are always challenges. Getting a name trademarked and hiring people you can trust are hard.

"Opening Dash New York was a risk because the rent was four times as much as we were used to and we weren't familiar with the city."