Movie: Blazing Saddles (1974)
Granted, Quentin Tarantino's Django Unchained has much more blood, profanity, and cartoonish violence, yet it'd be criminal to not pay homage to Mel Brooks' similarly minded Blazing Saddles as the originator. And in the film's funniest scene, the racial satirization is both spot-on and playfully hilarious.
Hired to lay down track, a group of black men start getting heckled by a douchebag honkey who asks them why they're not singing like the slaves used to do back in the day. When the guy asks them to croon a "good old n***er work song," they bust out into barbershop-quartet-like tune that's immaculately sung.
The white asshole interrupts them and suggests they sing something more along the lines of "Swing Low, Sweet Chariot." Or, as he and his honky buddies show in full-blown song-and-dance fashion, "Camptown Ladies." Which their even more despicable boss stops dead in its melodic tracks, saying, ""What in the wide, wide world of sports is a-goin' on here?! I hired you to lay down tracks, not prance around like Kansas City f****ts!"