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

Watch: Taylor Swift and Ellen DeGeneres on tour together.

If you’ve ever wondered what happens in the planning-stages of a special-guest appearance on Taylor Swift’s 1989 World Tour, then Ellen DeGeneres has come to the rescue with a behind-the-scenes look at her own real-life experience.

Bless.

Watch the 'interview’ below...