It's easy to get sucked into a nostalgic listening session, but tracking down the songs of your youth can be tougher than you think -- and "best of" medleys on YouTube will only do so much to scratch the itch. Don't worry, though, as The Nostalgia Machine has come to save the day. Pick a year and you'll see an easy-to-digest list of pop music videos that might just remind you of your high school prom or that big college party. It's definitely not an authoritative source -- what, no New Radicals? -- but it also covers a few artists that you might not remember until you hear them again, like Mark Morrison or Sonique. Give the Machine a spin the next time you're eager to revisit the zeitgeist of years gone by.