For all of you who had McPheever last year when Kat was on American Idol, meet those of us that were mystified by the “Who is LonelyGirl15 phenomenom last August/September.”

Katharine, a fan of the Internet mini-series LonelyGirl15, appears on the new episode “Truth or Dare” today. Now, if you aren’t up-to-date, there are a lot of clips to watch but this one pretty much stands on its own without any background.

You can watch the new video on the official LonelyGirl15 web site or on YouTube (where LG15 got started).