Andy Samberg and Joanna Newsom.  I don’t care for her music but her lyrics are pretty slick.

Down in the green hay,
Where monkey and bear usually lay,
They woke from a stable-boy’s cry.
He said: “someone come quick
The horses got loose, got grass-sick
They’ll founder! Fain, they’ll die.”

What is now known by the sorrel and the roan?
By the chestnut, and the bay, and the gelding grey?
It is: stay by the gate you are given.
Remain in your place, for your season.
O, had the overfed dead but listened
To that high-fence, horse-sense, wisdom…