They say that beauty's just skin deep,
But I've got a brand new perspective.
Your skeleton is symmetrical,
And your vascular system's effective.

You can't keep secrets from me,
'Cause I can always see it
With my X-ray eyes!

I got a brand new way of looking at life
An altogether different visual spectrum.
Sometimes photons behave like a wave,
But they're particles when you reflect 'em.

But that don't bother me,
'Cause either way I see it
With my X-ray eyes!
With my X-ray eyes!

With my X-ray eyes!

http://phineasandferb.wikia.com/wiki/X-Ray_Eyes