"Ding Dong Merrily on High"
From Tardis Wiki, the free Doctor Who reference
"Ding Dong Merrily on High" was a Christmas carol that the Eleventh Doctor heard playing from a speaker in Sardicktown while talking to Amy Pond. When Amy asked what it was and he replied "a Christmas carol", he was reminded of A Christmas Carol, and an idea was formed as to how he was to convince Kazran Sardick to save a crashing starliner.
Its lyrics included:
Ding dong merrily on high
In heaven, the bells are ringing
Ding dong verily the sky
Is riven with angel singing.
Gloria,
Hosanna in excelsis
Gloria,
Hosanna in excelsis
(TV: A Christmas Carol [+]Loading...["A Christmas Carol (TV story)"])