Kim Kardashian turned 29 on October 21 and the adorable Playboy model and reality TV star was asked to join America's Next Top Model as a guest judge.  The buxom brunette (who says she feels a bit old at 29) said she was "so honored" to be asked by Tyra Banks to appear as a guest judge on America's Next Top Model.

The 29-year-old joined the judge's panel on an episode of the CW show and she was over the moon to be asked to appear.She said to PEOPLE: "They called and asked me to be a part of it and I totally look up to Tyra so I was so excited. I really admire her business sense and who she is. "I get along with her really well. I was so honored when she asked me to do it." Kim admitted that she loves the show because it's got the "real excitement factor". She said: "I'm such a huge fan, always was. I watched it from the start. It teaches girls what it really takes to be a model. "Sometimes people think it's the easiest job in the world to just pose and all you're doing is taking pictures, but that's just a small side to it. "There's the business side of things and of course it's really competitive and it's got a real excitement factor."