Need a wake up call?

I'm the kind of person who loves to sleep late. Even when I go to bed around 9 or 10 PM, I'd usually found myself awake around 12 PM or 1 AM for no obvious reason. As a result, i often find it quite difficult to wake up in the morning. No amount of clock alarm or my cell phone reminder, or even wake up calls from cup cake can get me off my slumber.
All save one...
The chorus of about 2 dozen kindergarden-ers who happens to enjoy the first part of their education right next door. Every morning around 8-9 AM they would start either chanting, singing, or howl for kingdom come. The last thing they haven't tried is yodeling. Pray they never would get the idea...