For most people, creating mash-ups seems like something that's best left to the pros. But one Youtube user found an almost creepily perfect "Youtube Duet" that anyone can create with just a few clicks of the mouse.
The first song is LCD Soundsystem's slow-burner "New York I Love You But You're Bringing Me Down":
To create the duet, begin that song and then at the 0:32 second mark, start the second song, which is a Miles Davis improvisation from the 1958 film "Elevator to the Gallows":
If you time it right, the way they line up is so perfect that it seems like they must have been written for that exact purpose. If you would rather just see the end result, check out the video below:
Credit to Youtube user Alessandro Grespan for the discovery.