Simon Cowell (in-universe)

Simon Cowell was a judge on the X Factor. In 2016, Eddie Redmayne accidentally called him looking for Pudsey, but Simon, said "it's a no from me" and hung up. (TV: Looking for Pudsey)

The Wire once took on the Cowell's voice whilst attacking the Tenth Doctor through Max Wu's blue tooth speaker. Alice Wu recognised the voice due to its arrogant tone, with the Doctor citing the choice of mimicry to be fitting "if you're aiming for the essence of nastiness". (PROSE: Loose Wire)

Information from invalid sources
Cowell was once given a wedgie by a Krafayis. (NOTVALID: AAAGH!)