Candace: Let me explain, though it might seem strange to you
So please refrain from thinkin' bad of me
It gives me pain when I see what my brothers do
But no one else ever can see

I just want the truth known, so I call mom on the phone
But by the time she gets here, the whole thing disappears
Whatever they build every day, it gets taken away
No one sees it, of course, it's some mysterious force

To my mother every story's preposterous
Never believes no matter what I do
But though I'm right and she's wrong, I must confess
I'd probably think I'm crazy, too

I just want the truth known, so I call mom on the phone
But by the time she gets here, the whole thing disappears
Whatever they build every day, it gets taken away
By some mysterious force, no one sees it, of course

Candace and Stacy: Some mysterious force
Some mysterious force
Some mysterious force
Some mysterious force.

http://phineasandferb.wikia.com/wiki/Mysterious_Force