Stuck in my head...

I fell asleep last night listening to the adorable "Curious George" soundtrack, by Jack Johnson.  All day long, I've been singing random tunes from this soundtrack and I find myself smiling at the most inopportune times.  Like this afternoon, I was going into the little girls room at work and just humming the song "The 3 R's" when I realized that I was just standing in the restroom door with a line forming behind me.  I'm in need of serious help...  Why do I do that?  I'm always singing or humming.  Whether it's humming a few lines on a walk down the hall or singing "Gooooooood Morrrrrrrrrniiiiiiiiing" to the coffee guy, I'm in serious need of tune control.