Ring, Ring, Ring, ... *goosebumps*
That was pretty creepy, especially because of the horrific red-flash effect and the drastic ending. The horror/comedy combination is well thought. I also got a hook on the song, but with this "Clockwork Orange/Singing in the Rain"-overtone.
The sequel teaches a deserved lesson to shallow "make more"-claimers! How subtlety sadistic you guys are!