David Hasselhoff
From Tardis Wiki, the free Doctor Who reference
David Hasselhoff was a singer who had performed at the falling of the Berlin Wall. The Tenth Doctor once remarked that he had gone twice to the event in order to avoid Hasselhoff's singing. (NSA: Autonomy)
- The Doctor's comments related to the real life song, "Looking for Freedom", which was a number one hit in Germany at the time of the fall of the Berlin Wall.