#19 This Is Spinal Tap (1984)
The most brilliant mockumentary ever made revolves around the metal band Spinal Tap in the final days of their waning relevancy. Infinitely quotable and with an amazing soundtrack to boot, this movie offers laughs from start to finish. Christopher Guest, Michale Mckean, and Harry Shearer play the band's primary members, as the drummers aren't ever alive long enough to actually get much face time. This movie perfectly captures the arrogance of rock stars with the excess of the eighties, blended with the razorsharp conversational wit that can only be found in Christopher Guest films. If you've seen Waiting for Guffman, than you should be familiar with the kind of dialogue I'm referring to. The pseudo-interview style allows each character to distinguish themselves, as well as reveal just how empty headed they really are, and yet you can't help but feel sorry for characters that continually pour more of themselves into already doomed ventures. As if the film wasn't great enough, watching it again with the band providing voice commentary throughout makes for twice the experience. If you were to ask me how much more this film could be number nineteen on my list, the answer would have to be, none.