If I was at a club/having a party/etc, I'd much rather dance to "GET SLEEEAZY GET SLEEAZYYY" rather than some **** like "God makes no mistakes" or "I'll find someone like you". Eventually, "GET SLEAAAZZY" will be associated with having fun. I'd listen to it more and more, and like it more and more. Eventually I'll see the video. Download it from iTunes. Listen to it on the radio, request it on the radio. Buy the album, see the tour.
Now think of how many American parties/clubs are like this each day.
That is how Ke$ha, an 'irrelevant' according to most of you, uses clinical psychological association to spread her music to the youth of America, eventually smashing across the world.
Your faves could neva.