coup de main - noun
kü-də-ˈmaⁿ
Definition of coup de main : an attack that achieves complete surprise.

Watch: Harry Styles performs 'Boyfriends' live for The First Take.

Harry Styles is the latest musician to participate in The First Take (a YouTube Channel dedicated to shooting musicians and singers performing in a single take), performing a rendition of 'Boyfriends' from his latest album, 'Harry's House'.

Watch the performance below...