Not really sure what Justin Bieber is, despite airheads banging on about it constantly on Twitter, but found this – and found it amusing.
Well, Tennant’s facial expression anyway. If we could be bothered we’d replace the Bieber panel with one of Tom Spilsbury’s giving another run-out to his horrible description of Doctor Who fans as ‘dafties’.
Other possibilities: The Huw Edwards bit from Fear Her; anything from New Earth; Cyberwoman; Barrowman on one his awful talent shows; one of Pip’n’Jane Baker’s tongue-twisters.