“What do you call a singing elf?”/“A wrapper.”

Elves wrap toys, and there’s a Christmas riddle:
 
Q: What do you call a singing elf?
A: A wrapper (rapper).
 
“What do you call an elf than can sing ?........ A wrapper!” was posted to Twitter on November 26, 2012.
 
   
Twitter
ReindeerOfficial
‏@TeamReindeer
@ElvesOfficial what do you call an elf than can sing ?........ A wrapper!  #christmasjokes
3:07 PM - 26 Nov 2012
 
Twitter
Travel Red Arrow
‏@travelredarrow
Holiday Laugh:  Q:  What do you call a singing elf?  A:  A wrapper!  #Christmas #redarrow
10:32 AM - 17 Dec 2012
 
Twitter
Kelly Smith
‏@KellyWellyWoo91
What do you call a singing elf? A wrapper! #GoldCrackers
9:00 AM - 19 Oct 2013
 
Twitter
Adam Rushing
‏@ImRushing
What do you call an elf that can sing?
A wrapper
5:01 PM - 5 Dec 2013
 
9 December 2014, The Gold Coast Bulletin (Southport, Queensland), “‘Tis the season to be jolly!,” pg. 22:
Q: What do you call an elf who sings?
A: A wrapper!
   
Google Books
Christmas Jokes For Kids
By Peter Crumpton
PeteyRF Creative
2015
Pg. ?:
What do you call an elf who sings?
A wrapper!
 
Google Books
Oor Wullie:
The Big Bucket of Laughs Joke Book
By Oor Wullie
Black & White Publishing
2015
Pg. ?:
What do you call an elf who sings?
Oor Wullie: A wrapper!