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

Watch: Charli XCX + Caroline Polachek perform 'Tears' together live.

Charli XCX joined Caroline Polachek onstage last night at the Greek Theatre in Los Angeles to perform their 'Pop 2' collaboration 'Tears' together live.

Watch clips of the performance below...