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

Clairo has performed 'Steeeam' by Shelly for the first time ever.

Clairo declared she had a surprise in-store for her London show and she did indeed - performing the beloved track 'Steeeam' by Shelly for the first time ever. 

Watch a clip of the performance below...