Oh, come and stir my cauldron,
And if you do it right,
I'll boil you up some hot strong love
To keep you warm tonight.
-- sung by Celestina Warbeck on the Wizard's Wireless (HBP16)
A Cauldron Full of Hot, Strong Love is the title of a Celestina Warbeck popular song.
Some Muggles who had inadvertently picked up a Portkey on Clapham Common were transported to a Celestina Warbeck concert, where one of them was invited onstage during this number. In spite of a Memory Modifying Charm being applied, the Muggle wrote a hit song very like to the original. Celestina was reported as “not amused” (Pm).
Every generation has to sit through Christmas television programmes or listen to records that are favoured by their parents or the older generation. Someday you will probably be doing this to your children or someone else's....
From the Web
Writing by J K Rowling on Pottermore: Celestina Warbeck