Monday 21 March 2016 16:32, UK
Billy Vunipola interrupted his brother Mako's interview with Manu Tuilagi following England's win over France.
The England No 8 lip-synced a Backstreet Boys song as Mako and Tuilagi discussed the Grand Slam-clinching victory in Paris.
Play the video at the top of the page to watch Billy Vunipola's lip-syncing skills...
