The 33-year-old reality star made the revelation on the red carpet of her birthday party at Tao in Las Vegas last week, reported Aceshowbiz.
The "Keeping Up with the Kardashians" star also talked about her surprise engagement which took place at San Francisco's AT&T Park on her birthday.
"I cried afterwards. I was shaking. And when you're like, 'Is this really happening?' But you're just shaking... I honestly had no idea, none whatsoever. I knew we were going to San Francisco for my birthday, because he had a show there the next night. So I thought it was just a birthday dinner.
