Veggie Tales says it so well:
I'm busy, busy, dreadfully busy
You've no idea what I have to do.
Busy, busy, shockingly busy
Much, much too busy for you.
'Cause we're busy, busy, frightfully busy
More than a bumblebee, more than an ant.
Busy, busy, horribly busy
We'd love to help, but we can't!