Harry Potter devotees may remember Celestina Warbeck's vocal stylings from Chapter 16 of "Harry Potter And The Half-Blood Prince."
"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."
Mrs. Weasley's favorite singer and one of J.K. Rowling's "favorite 'off-stage' characters in the whole series" now has her own story in a short history by the author on Pottermore. And -- bonus -- visitors may also listen to her hit "You Stole My Cauldron But You Can't Have My Heart," inspired by real-life Welsh singer Shirley Bassey.
Celestina's name appears a total of three times throughout the series. Once in Half-Blood Prince, again in Harry Potter And The Chamber Of Secrets when Harry visits The Burrow, and finally in Harry Potter And The Deathly Hallows. Rowling said she'd "stolen" the character's name years ago from a friend she'd worked with at Amnesty International Headquarters in London.
On Pottermore, the site Rowling helped develop as an interactive retelling of her books, Celestina's 500-word history may be found in the "Floo Powder" room under "Harry Potter and the Chamber of Secrets."