It's all about the chorus.
The song "Takin' Care Of Business" was used in an episode of The Simpsons, "Saddlesore Galactica". Homer Simpson is shown at a B.T.O. concert, demanding that the band play the song. The band starts the song and Homer then yells, "Get to the 'workin' overtime' part!" The band obliges, skipping straight to the chorus. Later, just after finishing 'You Ain't Seen Nothing Yet', Homer requests that they sing it: when Bachman claims that they just did, Homer replies with a drawn-out 'What-everrr!'