Britney Spears' kids, Sean Preston, 11, and Jayden James, 10, stole their mom's phone and filmed her terrified reaction as Sean Preston jumped out at her when she wasn't expecting it. Because no one ever expects someone to be lying in wait, except maybe this guy. Or this one. It's pretty funny though, which is probably why they did it.

My damn kids 😂

A post shared by Britney Spears (@britneyspears) on

She startles like a champ! God, everything she does is adorable! It must be so much fun to scare her.