The eighth episode in the new series of Doctor Who, Mummy on the Orient Express, is a genuinely scary “throw a monster at a famous thing” instalment, but it also features this cameo from Foxes, performing a jazz standard version of Queen’s classic hit Don’t Stop Me Now.

Brief clips have been floating around for the past 24 hours or so, but here’s the song in its entirety. She’s having such a good time. She’s having a ball.

• Mummy on the Orient Express airs 8.35pm on Saturday, BBC1. Check back at 9.20pm for Dan Martin’s episode recap.