A four-piece band called the Koren Ensemble races through 15 TV theme songs in slightly more than two minutes in this awesome medley. It's a mashup guaranteed to seriously test your couch potato knowledge.

Starting with 'The Office,' the group seamlessly blends the theme songs from 'Friends,' 'Cheers' and more. As an added bonus, the band members recreate scenes from classic TV show openings to go along with the themes.

Watch now and see if you can name them all. If you're anything like us, countless hours spent in front of the tube will give you a perfect score.

[via BuzzFeed]