This baby is super fussy until she hears Katy Perry's "Dark Horse", and it's hilarious! If you have kids, what's their favorite song right now? br Subscribe for more videos! br br Baby Loves Katy Perry's "Dark Horse": br br Let us know your favorite videos of the day in the comments! If we make a video based on your suggestion, we'll mention your name on a future episode! br Follow us on Twitter for real-time updates! br br Like us on Facebook! br br Add us to your circles on Google+! br br Sign-up to our newsletter for the hottest videos straight to your inbox! br br br Edited By: Brian Lew