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

Watch: Paramore's mash-up of 'Grow Up' + SZA's '20 Something'.

Currently on tour in Europe, Paramore have added a mash-up of their song 'Grow Up' with SZA's thematically similar '20 Something' to their setlist.

SZA of course, is delighted:

Watch fan-filmed footage of the mash-up below...