By happenstance, I recently stumbled on what turns out to be greatest gym workout song ever, Daft Punk's Harder, Better, Faster, Stronger (especially from about 1:30, on). If there was ever a song that was designed for runnin' or liftin' weights or doin' the EFX machine, this is it. And it got me thinking, "What other awesome workout songs are out there that I've never come across?"

So I put it to you, friends: What are the best, most inspiring/energetic/manic songs out there for working out?

Let us tackle this task together: Let Us Build The Greatest Workout Mixtape EVER.

(Post your best suggestions below: The lesser-known the song, the better.)