1. When making the decision to dump your iconic opening credit sequence for the first time in twenty years, why wouldn't you do it by having your characters lip-sync to "TiK ToK" by Ke$ha?
2. The long animation-to-airtime delay with The Simpsons meant producers had to incorrectly gamble that "Tik Tok" would become our new "Single Ladies (Put a Ring On It)" by Beyonce, and not our new "Here Comes the Hotstepper" by Ini Kamoze.
3. Producers wondered how they could pay homage to the recent Shorewood High School lip-dub, only with a much worse pop song.
4. It was the only song left whose rights hadn't been purchased by Fox stable-mate Glee.
5. It is all part of an elaborate ruse to distract us from the fact that the lip-dub contains multiple references to Muhammed, somehow.