“Knock Knock” from musical group Brunettes Shoot Blondes is a creative and fun music video using some cool animation on iPhones, iPads, and Laptop computers. I have no idea how they were able to film this in real time but the end result is a cool music video from a group with an unusual name. If you like this you might also like to watch some band members play Christmas music using borrowed iPhones and iPads in the video iBand.