Tom Lehrer may have been the wittiest song parodist in our history. He only wrote 37 songs in his years on the scene in the 1950s and 1960s, and performed live a mere 109 times, but his material has lived on thanks to his records and, now, online video (Lehrer lives on, too -- he's 84 as I write this).
Here he is performing in a Student Association hall in Copenhagen, Denmark, in 1967. My wife, as much a longtime fan of Lehrer as I, knows every lyric to every song on his "That Was The Year That Was" album, but had never seen his face until we watched this last night. You'll notice three things, I'm sure: some of the students smoking cigarettes and pipes, their rhythmic clapping after each song, and how Lehrer combined clever lyrics with so many different musical styles, from Gilbert & Sullivan to ragtime to a march to showtunes.
[thanks to Meredith Selkirk for tipping me to this]