I have been a fan of BB / CBB since it started, I love the show and trust the casting people to get it right. In previous years, they have cast celebrities that I hadn't heard of, but the show ran well as we got to know them. Unfortunately, for me, some of this cast are not very famous AND are also very bland. I am having difficulty remembering some of their names, let alone what the do. I wouldn't know what Kim Kardashian looked like, but I know who she is. So, having her friend in the house might be justified if he is on their show. If I try to list the cast, I would remember him (maybe not his name though). There are a few of the girls that I have no idea who they are, can't remember where the are from (fame wise) and completely forget their names. I think this says more about them and their personalities than anything else.
I'm still watching though, as I enjoy the show.