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

Watch Charli XCX & Haim perform 'Warm' together live.

| by Shahlin Graves

Haim joined Charli XCX on-stage during her show at The Wiltern in Los Angeles this week to perform their collaboration 'Warm' together live.

Watch fan-filmed videos of the performance below...