Phineas: We're watchin' and we're waitin',
On the edge of our seats, anticipatin'.
It's looking awful permanent,
But we know it could go away.

We're keeping our eyes peeled, keeping 'em glued to the spot.
'Cause one moment it's there but then the next maybe not.
Don't know if it's magic or some weird cosmic plot,
So we're watchin' and we're waitin'.

We're starin' and we're glarin' 'til our corneas burn.
We hope it will stay for the rest of the day 'til our mama returns.
So don't even think about blinking or it just might go away.

So we're watchin' and waitin'.
So we're watchin' and waitin'.
Yeah we're watchin' and waitin'.
We're watchin'.

http://phineasandferb.wikia.com/wiki/Watchin%27_and_Waitin%27