How do you fit 50 songs into five minutes, and not make it sound like absolute garbage? The answer to that question comes from DJ Earworm, master of the mash-up, who has just released “United States of Pop 2015 (50 Shades of Pop).” It’s nothing less than his magnum opus—at a length of 5:19, he gives himself approximately 6.38 seconds per song from all the stars—Adele, Bieber, Drake, T-Swift—and somehow makes it sound fluid and fantastic. Hell, even the video is good! Watch/listen above, and marvel at the man’s mashing abilities.