Little Mix
From Tardis Wiki, the free Doctor Who reference
Bill Potts had a whole playlist on Spotify with songs by Little Mix. One of the songs on the playlist was "Black Magic". Shireen told Bill they needed to talk about her taste in music. (TV: Knock Knock)
Behind the scenes
"Weird People", another song by Little Mix, plays throughout the opening scenes of the episode, where Bill and her mates are searching for a house to live in.
