Would be interesting see most the most popular tweets for this hashtag adjusted in some way for #followers per retweeter to see if you could separate the "quality" of the tweet from the volume of followers it reached (to counter the Katy Perry factor mentioned)
I hate these memes so damn much. One ripples through your stream and you've just got dozens of lines of junk to wade through. The first one is cute, the rest are just obnoxious.
Wish Twitter for Mac had tweet filtering support. I know others do, but I'm psychologically dependent upon the Tweetie UI.