Kourtney Kardashian regrets having a boob job.

The 37-year-old reality star went under the knife when she was just 21-years-old and, looking back, can't understand why she made the decision because her assets were ''great'' as they were.

She said: ''I wish I never did it. I had great boobs. Now I'm gonna have to get them redone at some point.''

And the 'Keeping Up With the Kardashians' star - who has children Mason, six, Penelope, four, and Reign, 22 months, with ex-boyfriend Scott Disick - would never have Botox or fillers as she would rather look like herself and embrace her imperfections.

She insisted: ''I like to look like myself. I like imperfections, but you also want to look your best. I think lasers would be a good place to start if I was feeling like doing something.''

While Kourtney's sisters all have their own business ventures away from the show - with Kylie Jenner a make-up guru, Kendall Jenner a supermodel, Khloe Kardashian a successful author and presenter, and Kim Kardashian West's mobile game and Kimoji lines thriving - the oldest of the family is still looking for her ''thing'' and would love to take her passion for interior design further in the future.

She said: ''Everyone has their passion. I was just thinking yesterday, What's my thing? It would be fun to buy houses, decorate them as if I was gonna live there, and then sell them. Not right this second, but maybe later.''

Though Kourtney and her family live their lives in the spotlight, she is doing her best to ''protect'' her kids from life in the public eye.

She told Cosmopolitan magazine: ''I always think of what I can do to protect them. Their aunts are huge on social media.

''I'll go through phases where I'm like, everyone stop Snapchatting my kids! I don't really care that much to be famous. I'm living my life, and this is what happened. But I want to do whatever I can to let them live a happy life.''