How well do you know your TV themes? If you spend as much time in front of the tube as the average American, you should do pretty well this. A four-piece band called the Korean Ensemble put together a clip of them performing more than 15 TV theme songs and they even act out famous opening scenes. They go through 'The Office', 'Friends', 'Cheers' and many more. It's not as easy as you might think. If you have nothing better to do right now, watch the video below and see how many you can name.