The 'Keeping Up With The Kardashians' star admitted she got off to a rocky start when she first started hosting the 'X Factor' but says Simon's honesty and pep talks helped gain confidence.
She told HuffPostLive: ''I actually love Simon. I love that personality, I love the honesty. He was so phenomenal to me. He could tell I kind of lost my confidence the first week ... I got insecure for a minute, and Simon told me, 'I hired you for you, I could have hired any trained host, so be yourself.' And as soon as he said that, I felt like I was getting into my groove, and then it was the finale and now it's over.''
Khloe also revealed she was asked not to take any hosting lessons before she started, leaving her unprepared for what to expect.
She added: ''I've never done live TV before, and I was asked to not do any hosting lessons because they wanted me to be just myself. I found the day before because the stage was just built, that I couldn't read the teleprompter without glasses, so I had to get contacts the day before.
''Just learning how there's a screaming audience and you don't yell because the mic is right there ... I will have an earpiece in my ear, and while I'm trying to read the teleprompter then I have someone counting down ... and they're like, 'Okay, ask Simon this or that' ... There were so just so many pieces I never knew were involved in live TV.
''I do feel like through every show I got better and better, but my first week I literally was like, 'I am going to die. I want to fake a heart attack.'''