Halloween came early for Britney Spears when she got the scare of a lifetime from her adorable sons, Sean Preston and Jayden James. "We're gonna scare the heck out of mum," Sean explains to the camera while Jayden films him in a video Britney posted to Instagram on Wednesday. "We just stole her phone." The pair then waited in a dark room until the "Make Me" singer walks by a few seconds later, only to have her sons jump out and unleash an unexpected scream in a prank that would shave years off of anyone's life. Poor Britney immediately falls to the floor while screaming "PRESTON!", and although we feel for her, it's the best thing we've watched all week (sorry, Empire). Luckily the pop star recovered from her apparent heart attack in time to upload the clip, which she captioned "My damn kids 😂." Now who wants to take bets on how long Jayden and Sean are grounded for?