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

Listen: Charli XCX & Troye Sivan - '1999'.

As teased earlier this week, Charli XCX and Troye Sivan have teamed up together on new song, '1999' - a collaboration about which they both seem equally as enthused about.

Listen to '1999' below...