I watch the E! channel occasionally, so it's not hard to remember their channel name. And I watched that show for about 2 minutes once, so also not hard to remember it's title, as well as its star. Plus if you catch a glimpse of the covers of any rag at the supermarket check-out, or any show that deals with Hollywood info, she'll be mentioned at some point.

Even with a bad memory I wouldn't have had any problems remembering it, and I don't have a bad memory.

And TV people would be much happier if I actually watched it, which I don't. Me not watching means ad revenue they're not receiving. Just because I know of the existence of a show doesn't mean it works in their favour.