ODDLY CREEPY VIDEO: Nick Jonas Fans Sing Along Like Drones

This is a video of Nick Jonas singing a medley of popular tunes in front of a bunch of girls. But if you listen closely, you'll notice he doesn't really have to sing at all if he doesn't want to - he merely needs to start each song a little bit and the fans, like zombies, or cultlike drones, or something... just start singing it for him,