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

Echosmith - 'Cool Kids' live for Jimmy Fallon.

| by Shahlin Graves

Family-band Echosmith appeared on 'The Tonight Show with Jimmy Fallon' this week to perform their breakthrough single, 'Cool Kids'.

Watch the performance below…

P.S. Click HERE to read our latest interview with Echosmith.