"One of these things...

...is not like the others.
One of these things just doesn't belong.
Can you tell which thing is not like the others
By the time I finish my song?


Did you guess which thing was not like the others?
Did you guess which thing just doesn't belong?
If you guessed this one is not like the others,
Then you're absolutely...right!"

(Thanks to Rorate Caeli for photo and more on the Neocatechumenal Way.)