The Brief: A seasonal rhyming meme uses images in the format "you've heard of elf on a shelf, now get ready for ___ on a ___."

DEEP DIVE
The idea behind this meme is that the picture depicts something on top of another thing: something on top of something that rhymes with that thing.
For example, you’ve heard of Elf On The Shelf, now get ready for…
Bow On A Doe:
Hey @olivebrinker I love Rae the Doe so much I did a fan art. You've heard of an elf on a shelf, well… pic.twitter.com/GOqgAzCUpF
— Keytar Wolf 🎹🐺 (@KeytarWolf) December 9, 2018
Sister Jean On The Bean:
You've heard of Elf on a Shelf, now get ready for pic.twitter.com/4w9yQlCcaw
— Jason Girard (@jaybabylewis) December 6, 2018
Luke On A Duke:
you’ve heard of elf on a shelf, now get ready for pic.twitter.com/F1AAWic1ip
— anna (@polestralian) December 6, 2018
Juul On A Stool:
You’ve heard of elf on a shelf, but have you heard of pic.twitter.com/apStYzloQR
— e l i z a b e t h 🤪🤠 (@ElizabethhIlias) December 3, 2018
Eel In A Seal:
You've heard of Elf on A Shelf….
How about Eel in A Seal?! pic.twitter.com/L6yRYZIGGK
— HughDANcy (@DanIsAPhantom) December 6, 2018
Drake & Josh On A Macintosh: