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

Watch: Whitney perform 'Golden Days' live for Stephen Colbert.

Laneway 2017 act Whitney made their TV debut last week with a performance of 'Golden Days' - lifted from their debut album, 'Light Upon The Lake' - live on The Late Show with Stephen Colbert.

Watch the performance below...