Abigail's Song
From Tardis Wiki, the free Doctor Who reference
Abigail's Song is performed by Katherine Jenkins for the Doctor Who episode "A Christmas Carol".
Behind the scenes
This song is the second pure english song composed for Doctor Who next to The Stowaway.
This several lines of the song are "Silence is all around, Silence is all you'll be and Silence is all you know" which are most likely references to The Silence.
